2. What is visible light?
Visible light is the electromagnetic radiation cause the vision directly.

3. What is the spectrum of the visible light?
The spectrum of the visible light is 380nm to 780nm

4. What's light character when the spectrum slightly less than 380nm, What's light charater when the spectrum slightly more than 780nm.
When the spectrum slightly less than 380nm, the light is ultraviolet ray; when the spectrum slightly less than 780nm, light is infrared ray.

5. What's the sensitive wave length for the man eyes?
The sensitive wave length to the man's eyes is 555nm

6. How the light will be change when the spectrum move from 780nm to 380nm?
The light will change to red, orange, yellow, green, blue, purple in turn.

7. How many kinds of the ray radiation?
Ray radiation have three kinds: ultraviolet ray, visual light, infrared ray?

8. What's glare?
Glare is the phenomenon that the people feel uncomfortable or eyesight decline caused by the light can be seen.

9. How many kinds of glare in the road light?
Inability glare and uncomfortable glare.

10. What is light source?
In the lighting engineering, illuminant(light source) is the matter can radiate by themselves and can be feel as light by people eyes.

11. What 's point source of light?
It refer to the source of light whose size can not be ignore when it is count.

12. What is radiation energy?
The energy eradiate, transmit or receive by radiation. The signal: Q?锟燪e Unit: J

13. What's radiation power, and radiation flux?
The power eradiate, transmit or receive by radiation. The signal: P(搂? e 搂?) Unit: W

14.What's the in tenison of vadiaiate?
The fountain of dot (radiatel or side of radiate)is behind include to order direction bring inside of solid angle buck radiatiate flux than with this solid buck.sign:I,IeIe=d e/d ,unite watt/degree of sphere(W/Sr)

15. What is the spectrum vision efficiency?
Under the certain condition of light, the feeling by the light intensity is the same, the wave length the ratio of the |?m and |?, the |?m value is 1 (max. value) Signal: photopic vision V (|?), dark vision V'(|?)

16. What's luminous flux?
It us the flux educed by the product of the radiation flux 搂?e (|?) and the standard vision efficiency V(|?). In the condition of photopic vision: the luminous flux can be denote as: 搂?e (|?) is among the radiation flux value of |? + d|? V(|?)-CIE spectrum efficiency, it is value is the function of the |? According to the international agreement, When the length wave is 555nm, Km will be amount to the maximum value of the spectrum vision effect curve. Km is 683Im/W". Signal: 搂?, 搂?v unit: (lm)

17. What's the lighting Intensity?
(In the same direction)? The ratio of the light flux of the solid angle emit by the sources of light and the solid angle, the signal:

18. What's the lightness?
In give way of some surface buck flaring intension and this surface buck in upringht just projection's contrast with bring aspect.

19. What's the light of the sources?
The ratio of the light flux and the electric power consumption.

20. What's include the current circuit electricity?
Resistance, reactance, conductance, susceptance

21.What's incandescent lamp?
The lamp that rediation by the heating up material with the electricity.

22. What's vacuum lamp?
The incandescent lamp that The light of the sources radiate in the vacuum glass bulb

23. What's gas-filled bulb?
The Incandescent lamp that the light of the sources radiate in the glass bulb filled with the nitrogen and inert gases

24. What's tungsten halogen lamp?
The incandescent lamp whose filled gas including the haloid element or haloid.

25. What's the ordinary lighting bulb?
The incandescent lamp used in family and street and factory commonly light, the glass bulb can be transparence or frosted or milk-white or white smear inner..

26.What's discharge lamp?
The lamps that are radiate by the discharge with the air and metal vapor or several kinds vapor or metal metal.

27.What's glow bulb?
The lamp radiate by the glow discharge.

28.What's metal vapor lamp?
The lamp radiate by the metal vapor as the mercury lamp, sodium lamp.

29. What' mercury lamp?
The lamp radiate by the mercury vapor.

30. What's low intensity mercury lamp?
The mercury lamp whose intensity of the mercury partial pressure less than 102Pa when the electricity is stable.

31.What's high intensity mercury vapor?
The mercury lamp whose intensity of the mercury partial pressure up to or more than 102Pa when the electricity is stable.

32.what's super high mercury vapor lamp?
The mercury lamp whose intensity of the mercury partial pressure up to or more than 102Pa when the electricity is stable.

33. What's the fluorescence high intensity mercury vapor lamp?
The high intensity mercury vapor lamp which was smeared the fluorescent material on the outside of glass bulb.

34. What's the blended-fluorescence high intensity mercury vapor lamp?
The high intensity mercury vapor lamp equipped with the wire inside which used as the ballast.

35. What's the fluorescence lamp?
The lamp are radiated by the fluorescence powder layer which are inspired by the ultraviolet radiation caused by the electricity.

36.What's preheating switch fluorescence lamp?
The fluorescence lamp switch by preheating the negative pole.

37. What's high-speed switch fluorescence lamp?
The Fluorescence lamp which can be stared quickly as the electrified utilized the structure and attached equipment.

38. What's instantaneous switch fluorescence lamp?
The fluorescence lamp starting without preheating the negative pole.

39.What's the xenon lamp?
The lamp radiate by the xenon.

40. What's the high intensity xenon lamp?
It's time discharge stabilization in lamp gas of xenon's pressure obtain around 10?Pa's sodium lamp.

41, what cry to exceed highly(gas) press xenon lamp?
Reply: discharge stabilization, the xenon lamp its intensity of pressure in lamp the gas achieves 10 Pa ..

42, what call lamp the sodium (vapour) lamp ?
Reply: mainly is to be discharged by sodium vapour but shine put the electric light.

43, what call lamp of sodium (vapour) high-handed?
Reply: discharge stabilization, sodium lamp its intensity of pressure in lamp sodium vapour achieves 10?PA .

44, what call halid lamp metal?
Reply: is resolved by metal vapour and metal halid the thing mixture discharges but shine put the electric light.

45, what call the lamp cap?
Reply: fix lamp on lamp stand, lamp part that cause lamp and power supply to appearance connect.

46, what call the screw mouth for lamp cap ?
Reply: use a whorl and lamp stand to carry out lamp cap that connect, use "E" symbol

47, what call t the cut for lamp cap?
Reply: use the bolt and lamp stand to carry out the lamp cap that connect, use "B" symbol.

48, what call lamp stand?
Reply: maintain lamp position and cause lamp and power supply to appearance connect part of an apparatus or appliance.

49, what call dampproof lamp stand?
Reply: lamp stand that offer the humid environment and outdoors to use. This kind of lamp stand when using such function doesn't accept the influence of rain and humid climate.

50, What is the basic request of the way light source ?
Reply: should have lifespan is long, light effects is high, reliable, good characteristic of unanimous, but the prominent color and color watch should coincide with given illumination section of a highway or railway or place request.

51, Which have the principle of the way illuminate to select the light source ?
Reply:
1?trunk road time stick road is proper to adopt the high-handed sodium lamp .
2?distinguish the colour asks highway not high suburb, rapid road is proper to use the low pressure sodium lamp.
3?The center of the city, trade street distinguish the colour asks high place to is proper to use metal halid lamp or adopts mix to merely illuminate.
4?illuminate to is not high, car is less support road and reside area way can use the fluorescence high-handed sodium lamp.

52, what is the meaning of illuminate establishment defends?
Reply: illuminate establishment锟÷╥nclude supply electricity the route, electric facility and lamp?should regularly proceed the defence manages, cause such to maintain good, safe , credible move status, to produce the good illumination effect and society effect.

53, How to express the count formula of bright lamp lead ?
Reply: bright lamp leads = overall spot check lamp number - extinguish lamp number/overall spot check lamp number ?谩 100%

54, How to classify that illuminate currently, press shine principle is used
in the electric light source ?
Reply: divide into two main types that the heat radiation light source and gas discharge the light source .

55, Which parts is mainly comprised for incandescent lamp soak
Reply: incandescent lamp is soaked mainly by glass some composition of shell, filament, glass shelf and lamp cap.

56, incandescent lamp soak is vacuum in the shell?
Reply: 40w incandescent lamps soak is vacuum in the shell, 60w and more than incandescent lamp soaks in the shell sufficient there is inertia gas.

57, why incandescent lamp soak want sufficient inertia gas in the shell?
Reply: in the bulb sufficient is to in order to cut down tungsten filament evaporation according to purpose of inertia gas. Tungsten encounters the stop of inertia gas among process that evaporate, there is a portion of tungsten particle to turn back to filament. After decrease that evaporate can accordingly boost filament job temperature, thereby boost the bulb shine efficiency.

58, High-handed mercury bulb are comprised mainly by which parts?
Reply: high-handed mercury lamp is mainly comprised by the lamp cap, hard glass shell锟÷╥nside apply the phosphor powder?, the own electrode, assist the electrode锟÷╰rigger extremely?, quartz glass discharges to take care, resistance etc .

59, High-handed sodium lamp are comprised mainly by which parts?
Reply: the high-handed sodium lamp is mainly comprised by the lamp cap, hard glass shell, porcelain to discharge lamp tube, double metal piece, the metal shelf etc .

60, low pressure fluorescent light are comprised mainly by which parts?
Reply: the low pressure fluorescent light is mainly comprised by a foot, hard glass lamp 锟÷╥nside apply the phosphor powder, inside there is the mercury?, the oxide cathode, exhaust tube.

61, why high-handed mercury lamp extinguish after start at once now again, need a period of time can normally shine?
Reply: because after the normal ignition point extinguishes, the high-handed mercury lamp bulb discharges take care inside the mercury vapour stress is very high, when the bulb doesn't cooling, accordingly start the tension is very high, therefore even if electrify after lamp extinguishes at once, lamp can't open bright at once, usually need pass 5~10 minutes, cooling stay bulb, after in lamp the mercury vapour freezing open again bright.

62, Which does matter notice using high-handed mercury lamp ?
Reply:
1?the power supply tension allows the skew values for postive and negative 5%
2?the bulb will position ignites, when standard position ignites, light quantity will cut down 7%, lamp easily from extinguishes.
3 After the outside of glass shell fragments , discharge electric light tube still can shining, but can't be used to illuminate, even have large amount of ultraviolet to radiate is harmful to human body
4?lamp should consider to heat radiation
5?the bulb needs to use with relevant standard ballast and befit lamp package.

63, Which shortcomings do incandescent lamp has?
Reply: advantage: the cost is low; easy to use, the light lamp doesn't need any enclosure; but follow open follow close, the merely color gentle, prominent color index is high; adjust illumination; service convenient. Shortcoming: shine the efficiency is low; ask to is relatively higher to power supply tension.

64, Which shortcomings do high-handed sodium lamp have?
Reply: advantage: light efficient is high; ipurple outside radiate to little; the penetrate fog is good; lifespan is long.
Shortcoming: the prominent color differs; start the tension is high; the cost is high.

65, why inside trigger the high-handed sodium lamp extinguishes after start at once again, require a period of time can normally shine?
Reply: because inside trigger the high-handed sodium bulb after the normal ignition point extinguishes, electric arc take care inside the vapour presses very high, on the ballast the response electro-motive (emf) force seems inadequate, stay the bulb cooling, therefore must start the ignition point again.

66, what call stepless discharge electric light?
Reply: there is no electrode gas to put the electric light , Also call lamp the response.

67, What is the job principle of stepless discharge electric light ?
Reply: After stepless discharge electric light is electrified , the high frequency magnetic field that produce among electric light socket through high frequency coil coupling effect to lamp shell gas, uses the electron among gas and ion happen the sport.

68, What is the principle of inside trigger the high-handed sodium lamp starts ?
Reply: inside trigger install in the high-handed sodium bulb there is one to heat the coil and double metal piece trigger switch, trigger switch and electric arc take care of parallel connection to connect. When the bulb is connecting the power supply, the electric current passes trigger switch constantly close knock point, double metal piece is heated up bending, cause constantly close knock point break, among moment circuit that break the electric current for zero, also at ballast both ends produce the response electro-motive (emf) force, such stacks with power supply tension at together, produce a pulse high-handed electric arc take care inside gas puncture, cause the bulb to ignite.

69, why inside trigger lifespan of high-handed sodium lamp than outside the lowness that trigger?
Reply: inside trigger lifespan of high-handed sodium lamp depends in the bulb heat the coil , lifespan bulb electric arc takes care can reach more than 20,000 hours, but heat the coil burns, the bulb is unable to also point to brighten; outside trigger the high-handed sodium lamp have not heats the coil, such lifespan completely depends electric arc takes care, trigger at actually lifespan of high-handed sodium lamp than outside the lowness that trigger.

70, what call the radiation energy ?
Reply: launch according to radiation format, spread or the energy that receive. Mark: the Q, QE, unit: the joule(J).

71, what call radiation power, radiation connect to estimate?
Reply: launch according to radiation format, spread or the power that receive. Mark: the P锟÷▅渭 the E, |渭?, unit: title[especially](W).

72, what call radiation intensity ?
Reply: point radiant锟÷╫r radiate face element?at include give the direction on solid angle element inside radiation that send out connect estimate with that solid angle ratio of element. Mark: the I, the IEIE=D |渭 the E/D |?, unit: title[especially ]/ spherical surface degree the (W/SR).

73, what call the spectrum to merely look the efficiency?
Reply: under given luminosity condition, cause merely light intensity to feel to be equal, wavelengh for |? the M and |? two speak that radiate connect estimate of than, |? the M chooses at the biggest ratio for 1 place. Mark: the clear vision uses the V锟÷▅??, the dark vision uses the V 篓@锟÷▅??.

74, what call light quantity?
Reply: is connected by radiation estimate 搂? the E锟÷▅??merely look with standard spectrum the efficiency V锟÷▅??the product is unknown capacity. When clear vision, light quantity but use below the type expresses: |渭 =Km ?貌|渭?锟÷▅??the OV锟÷▅??the D |? mark: |渭, |渭 the V, unit: clear(LM) flow. Among type: |渭 the E锟÷▅??- relevant at |? and +d |? between radiation that is included connects to estimate; the V锟÷▅??-CIE the spectrum merely looks the efficiency, its valuation is |? the function; the KM- spectrum merely looks the efficiency curve K锟÷▅??the maximum, according to international agreement, at wavelengh for 555nm places, the KM is 638lm/w. m

75, what call a light intensity (light source give direction)?
Reply: the light source at include give the direction on solid angle element inside light quantity that send out and solid angle ratio of element. Mark: the IVI, the IV=D |渭 the V/D |?, unit: pit[the virtue pulls ]/ the (CD).

76, what call(merely) illumination?
Reply: certain face element on give the direction shine intensity with that face element at plumb at flat surface that give the direction on than of positive shadow area. Mark: unit of L(LV): pit[the virtue pulls ]/ square metre the (CD/M2).

77, what call a light efficiency(light source)?
Reply: light quantity the light source sends out with consume than of electric power. Mark: |? the V, |?, unit: flow clear/title the (LM/W)

78, what call the light source prominent color?
Reply: under given condition, the object illuminates use light source and illuminate use standard light source, the extent such colour coincides.

79, what call the light source prominent color index?
Reply: under given condition, the object uses the light source to illuminate and illuminate use standard light source, such colour coincides with extent measurement, use the number to express such quanta.

80, what call discharge?
Reply: carry a son produces under electric field strength effect and sport cause the electric current through gas or metal vapour but electromagnetic radiation that produce.

81, what cry bright merely discharge?
Reply: two cathode electrons launch the specific heat electron launches must is much big one kind discharges, such characteristic is cathode bit drop large (70v) and electric current density small.

82, what ask arc to discharge?
Reply: the cathode digit drop than bright merely discharge much small discharge. When arc discharges, the cathode electron launches can is due to many kinds of reasons锟÷╰he hot electron launches, the scene is send launch etc?at the same time affect or respectively affect and cause, and two electrons launch just occupy very small part.

83, what call electric arc?
Reply: among arc discharge shine pillar.

84, what call maintenance rate?
Reply: the light source ignition point arrives light quantity of rule time with at the beginning than of light quantity.

85, what call light source lifespan?
Reply: according to some kind skill, before the light source becomes null and void or is considered null and void, the light source accumulation ignition point time.

86, what call light source fixed lifespan?
Reply: lamp design lifespan, experiments to confirm through lifespan of similarity model lamp.

87, what call light source average lifespan?
Reply: with batch lifespan experiments lamp is measured obtain lifespan arithmetic mean value.

88, what call light source mid-value lifespan?
Reply: among batch tests lamp for N lifespan, according to lamp damage the sequence, NO.[the (N-1) /2+1] individual lamp lifespan锟÷╰he N for odd number?or the NO. N/2 and NO.(N/2+1) individual and of lamp lifespan half锟÷╰he N for even number?is known as should batch lamp mid-value lifespan.

89, what call the light source old to refine?
Reply: for cause lamp parameter stable, at the beginning that proceed under given condition the light lamp.

90, what call the light source start the time?
Reply: connect put electric light power supply switch to lamp can begin work the time that is needed.

91, what call the light source start the tension again?
Reply: After discharge light stabilize the job , break the power supply, from once again connect the power supply goes to lamp to resume work the time that is required.

92, what call the light source start the tension again?
Reply: discharge light begin continue discharge, the lowest tension that is required between electrode.

93, what call the tension lamp?
Reply: exert at the light source electric light socket knocks point on the tension.

94, what call the light source fixed tension?
Reply: the lamp design works the tension (uniflow or efficient value of communicate ).

95, what call the warm-up electric current the cathode?
Reply: cause warm-up start the cathode of type fluorescent lamp achieve normally launch the electron job temperature is exerted the electric current.

96, what call the electric current lamp?
Reply: when the light source stable works, knock through light source electric light socket point on the electric current.

97, what call the light source fixed electric current?
Reply: lamp at fixed the tension below the design electric current.
98, what call the light source fixed power?
Reply: the lamp design power.

99, what are electric light source fixed tensions, fixed the electric current, fixed the power?
Reply: the tension that mark clearly on the electric light source or tension scope cries fixed the tension; the electric current that mark clearly on the electric light source cries fixed the electric current; the power that mark clearly on the electric light source cries fixed the power.

100, which safely symbolize should have on the electric light source ?
Reply: the origin symbolise (factory title or trademark) fixed with representative's electric light source the tension, fixed the electric current, fixed the power or other fixed the parameter electric light source model.

101, which safely symbolize should have at the electric light source outer packaging box or outer packaging chest ?
Reply: the original sign, electric light source model, electric light source ignition point position锟÷╥s like to there be the restriction?and safely transport the sign.

102, How many distance is each E27 and crust of E40 electric light socket and live the climb between body electricity ?
Reply: the crust of E27 electric light socket and live the climb between body electricity distance is 3mm, the crust of E40 electric light socket and live the climb between body electricity distance is 5mm.

103, How many the biggest warm rise is that using neighborhood lane illuminate the incandescent lamp electric light socket ?
Reply: neighborhood lane illuminates incandescent lamp that use 60w electric light socket the biggest warm rise for 120 ??; in the neighborhood lane illuminates incandescent lamp that use 100w electric light socket are the greatly the warmest rise for 130 ??.

104, what call receiving the zero?
Reply: willingly electric facility and use electricity installation the metal shell and system zero thread connect to be known as to receive the zero.

105, what call earthy installation?
Reply: earthy installation is transitional installation that connect electrical appliance and earth, is expertly for flow divulge the thunder electric current and earthy short circuit electric current installation, it includes earthy the body, earthy thread part.

106. what call prevent the thunder earthy? Which parts is include of Prevent the thunder earthy installation ?
Reply: rapidly introduce for actually thunder electric current earth is the purpose to prevent the thunder stops damage to crops caused by thunder earthy call to prevent the thunder earthy. Prevent earthy installation includes the following part:
1? thunder and lighting accepts installation: is directly or indirectly accept thunder and lighting metal stick (receive the flashy device), if the lightning rod, avoid the thunder brings(net), the make a mere figure-head earth wire and lightning arrester etc.
2? earthy thread (lead thread): thunder and lighting accepts installation and earthy installation connects the metal conductor that use.
3? earthy installation: earthy thread and earthy body total.

107, Which requests has the burying of earthy installation ?
Reply: earthy the installation burying depth and decoration style according to design to ask to construct. Earthy body summit that generally burying among earth answers 0 the distance ground.5~0.8m.
1? when burying, the angle iron of lower end must reduce sharp, the steel tube of lower end must process become sharp or round take care beat flat plumb infiltrate underground, the flat steel burying underground must set up to put.
2? dig first before burying firstly broad 0.6m, 1m deep underground drainage, will earthy again the body infiltrates underground, upper end bare 0 at channel.1~0.2m, so as to the weld earthy thread.
3? before burying, must examine all connect part, must use to electric welding or gas welding the weld is fastidious, such contacts face generally must not is smaller to is 10cm2, must not use the tin to solder.
4? after burying, earthy the body surrounding returns fill newly soil tamp, must not fill to enter the brick burnt dregs. For gauge earthy resistance is convenient, should receive at suitable positional adornment wiring the check post, according to prepare gauge earthy the use of resistance.
5? is like make use groundwater take care or the building metal member naturally earthy the body, should guarantee to there be good contact under any situation.

108, what call the tension?
Reply: by strength system due to external part锟÷╨ike thunder and lighting?reason and internal (is like breakdown jump gate or normally operate), can appear to cut all ties the shorter tension that have harm of continuity time rises, this kind of tension rises to be known as high-handed.

109, general transformer substation is equipped with which prevent thunder facility?
Reply: transformer substation generally installing there is prevent clique model lightning arrester, magnet that thunder facility has the lightning rod or lightning conductor, as well as relevant tension rank to installing blows lightning arrester and with this appearance coordinate enter thread protects part, namely make a mere figure-head earth wire, take care model lightning arrester or sparkle interval and earthy installation.

110, what call earthy?
Reply: among electricity system, willingly electric facility and use the neutral point of electricity installation, the shell or barring and earthy installation uses the conductor to make the good electric connects to call to earthy.

111, what call work to earthy?
Reply: under normal situation, in order to guarantee electric facility credibly moves, must hold certain among electricity system a little earthy, is known as to work to earthy.

112, what call protect to earthy?
Reply: for prevent electric facility cut all ties damage but happen get an electric shock accident, willingly electric facility normal situation below the metal shell that doesn't live or construct frame connect with earth, is known as to protect to earthy.

113, what call earthy resistance?
Reply: refer electric facility earthy the some right place tension with earthy than of electric current.

114, the choice burying underground part earthy thread flat steel sectional area.
Reply: burying underground part thread flat steel sectional area that earthy should be not smaller than 48mm2, round steel diameter should be not smaller than 8mm.

115, select in the room to is clear reveal part earthy sectional area of thread flat steel.
Reply: in the room is clear reveal part thread that earthy flat steel sectional area should be not smaller than 24 MM2, round steel diameter should be not smaller than 5mm.

116, select the independent lightning rod to earthy thread sectional area.
Reply: the independent lightning rod earthy the thread section amass, copper thread for 25 MM2, the steel string for 35 MM2.

117, select clear illumination installation that lay to earthy thread sectional area.
Reply: is clear installation naked copper thread that lay earthy thread sectional area should be not smaller than 4 MM2, clear adornment steel string diameter should be not smaller than 4mm, cut all ties copper thread sectional area should be not smaller than 2.5 MM2; illuminate installation earthy thread sectional area should must not be smaller than 1.5 MM2.

118, what call protect to receive the zero?
Reply: at the low pressure three appearance four make the system mid electric facility doesn't live the metal shell, use the conducting wire to directly connect with zero thread, say to protect to receive the zero.

119, How to carry out the count that averagely intensity of illumination?
basis make use of the coefficient ?
Reply: EAV= |?搂? MN/WS
type mid: |? - make use of the coefficient, the width and lamp according to way install the height, hang carry and langle of elevation, by lamp make use of coefficient diagram of curves to look up;
搂? - the bulb light quantity;
M- defends the coefficient, follow lamp use environmental spare parts and defence situation different and different;
N- every lamp inside the practical ignition point bulb amount;
W- road surface width;
S- lamp distance.

120, what call lamp?
Reply: can any allocate, pass through or change from one or many light sources light, also including all needs are used to bearing, fix and protect facility of light source part, but doesn't include the light source itself, even there is essential circuit assist installation to connect that facility to arrive at power supply.

121, what call common lamp?
Reply: there is no special dustproof to dampproof to protect type lamp.

122, what call inlay type lamp?
Reply: the completion that is appointed by factory or part earth inlay lamp that install surface.
.

123, what call the ballast?
Reply: willingly inductance, electric capacity or resistance use single or assembly way inserts the power supply and one or many put between electric light, mainly is used limited value the lamp electric current to rules.

124, what call the independent stylish ballast?
Reply: by one or many alone the element the energy that comprise install independently at external part ballast of lamp.

125, what call inside the adornment type ballast?
Reply: General design adornment to load into lamp internal, but is no special measure to can't at external part ballast of lamp.

126,What do express of lamp basic optics property ?
Reply: the lamp basic optics property uses up strongly distribute the curve, protect the corner and efficiency three guideline come to express.

127, what lights that call lamp strongly distribute the curve?
Reply: the lamp light strongly distributes the curve also says to join the merely curve, usually is at through illuminate the device shines central flat surface on, use suitable coordination hold strongly merely express for angle锟÷╢rom the moment certain gives the direction calculate rise?the functional curve.

128, lamp light strongly distribute the curve has several coordinates to express law?
Reply: the lamp light strongly distributes the curve has the unknown light to strongly distribute the curve and rectangular coordinates strongly merely distribute the curve.

129, what call the lamp protection corner?
Reply: the lamp protection corner is the light source shines the body borderline with lamp below the destiny connection with standard thread between the unknown
.

130, what call the lamp efficiency?
Reply: the lamp efficiency is illuminate than light quantity the device sends out sends out with light source of light quantity, use the percentage meter to show. It heightens the lamp optics systematic efficiency, also as reflect illuminate a guideline of device skill economic effect good or bad.

131, How do International Electric Committee(IEC) grade to lamp dustproof waterproof function?
Reply:
1?the lamp dustproof function divides into 6 levels:
one level dustproof: protect bigger than 50mm solid things;
two levels dustproof: protect bigger than 12mm solid things;
three level dustproof: protect to bigger than 2.5mm solid things;
four levels dustproof: protect to bigger than 1.0mm solid things;
five levels dustproof: also say "dustproof";
six levels dustproof: also say to completely dustproof or "the dust secret". 2?the lamp waterproof function divides into 8 levels:
a waterproof: prevent to plumb raindrop that fall;
two waterproof: prevent according to most greatly reach raindrop that 150o angle of inclination fall;
three waterproof: prevent rain, also says to prevent "drain";
four waterproof: prevent "splash";
five waterproof: prevent "puff";
six waterproof: prevent big wave;
seven waterproof: prevent to soak, also say "the water secret";
eight waterproof: prevent the long time soaks, also say "pressurize the water secret".

132, What meaning do P54 express?
Reply: International Electric Committee rules lamp the crust the dustproof, waterproof rank by alphabet IP (protect guideline) the heel two numbers express锟÷╰he IP ?谩?谩?. First number expresses dustproof the level, the second numbers level waterproof. Ip54 expresses lamp dustproof for 5 levels, 4 waterproof.
133, What meaning of using lamp defends coefficient ?
Reply: lamp during use, due to light source light quantity will gradually weaken; lamp within and without surface can accumulate the dirt and other dirty things, lamp reflects light board is corrupted, cause such efficiency to gradually bring down, merely export gradually cut down, thereby cause illumination standard on road surface to gradually drop. For guarantee illuminate design to count accuracy, must draw to defend the coefficient.

134, Which factors is related to lamp defend the coefficient ?
Reply: lamp itself defend the coefficient is related to following factor:
1? the lamp airtight extent;
2? the air filthy extent;
3? clear the period and clearance thorough every time extent.