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Illuminates the basic concept |
The humanity uses the eye the light, after is sense the nerve extension changes into the signal transmission to the cerebrum therefore illuminates then becomes in the human daily life the ,The humanity while commonplace is having a pair of perfect eye, also must have to have the suitable light illumination coordination to be able to display its function, therefore the suitable illumination is, But in the light illumination insufficient dark environment, the eye is unable clearly to recognize the object, but also is unable under the too bright dazzling light to see clearly the thing, therefore, Not only the easy shade to cause eye strain to create nearsightedness , simultaneously also reduces the working efficiency, is progressive along with the society, the level of living enhances, the person also.
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Color Temperature |
The color temperature is by indicated to the temperature that, is depends on the standard blackbody to heat up, temperature increment to some degree when the color dark red starts by, Flesh color, orange yellow, white, blue white, blue ,,Gradually changes, uses this kind of colored light change the characteristic, when some light discoloration haracteristic, some photosource light
Color warm5000k Color warm4000k Color warm3000kcolor and the blackbody luminous spot is same, we then were called the black body to the temperature color temperature of the this photosource. Chromaticity when 3000K, the light color starts to have the red phenomenon, for person one kind of warm feeling.The color temperature surpasses when 5000K the color can be partial to the blue light, for the person is one kind of chilly feeling. The usual subtropics person compares likes above 4000K the color temperature, but the frigid zone person compares likes below 4000K the color temperature.
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| Color warm5000k |
Color warm4000k |
Color warm3000k |
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International illumination association color temperature table
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temperature
(Kelvin) was in 1848 the English physicist Kerr article proposed to emperature K that, he thought Celsius below zero 273.16 were the
temperature beginnings, therefore the temperature computing mode was Celsius below zero 273.16 is the temperature beginning, therefore the temperature computing mode, was Celsius below zero 273.16 adds on a class of commonly used centigrade temperature, like the human body normal temperature was 36, also was temperature 309. |
Color Rendering Index
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Photosource the degree which presents to the object color is called develops color nature CRI (or RA), also is the color lifelike degree.
Develops the color high photosource to the color performance better,
we saw the color also comparatively approaches the natural primary
color, develops the color low photosource to the color performance worse, we saw the color deviation is also bigger. Why can have develops situation of occurrence the color height Its key lies in dispersion of light of characteristic this light, wave length of the visible light scope of in 380mm to in the 760mm, also is we in the spectrum , Saw red orange yellow green Blue purple scope, if the photosource emits in the light contains in various colored lights contains various colored lights proportion and the natural light approach, then we but the eye can see the face luster also can be lifelike. The good decoration ornaments, the rtware, clothes also can because of choose not the right photosource to distort.
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Light terminology |
The photosource efficiency is the lumen which its sends
out eliminates by its power consumption obtained value:
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| Name |
Unit |
Explanation |
| Luminous Flux |
lm(lumen） |
Sends sum total of the quantity which hotosource each second institute sends out, simple said is the light quantity.
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| Luminous |
cd(candela） |
The light intensity, the quantity which emits in ome specific angle of deflection.
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| illuminance |
Lm/m2(lux） |
In the unit area injects the light the quantity, also is the light beam eliminates the value which (m2) obtained arrives by the area, uses for to express some place bright brightness.
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| luminance |
Nt cd/m2
Stibe cd/cm2 |
From some on the one hand sees the object counter- light the intensity. In other words the unit area to some intensity of the light which on the one hand reflects. The degree of illumination is expresses in the unit area the incident light uantity. Brightness expressed eye object eflected light intensity which sees from some direction.
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| Mean lifetime |
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The only one batch of light bulbs light a lamp to 50% quantity damage not bright time.
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| Economic life |
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In simultaneously considered damage of as well as the light beam output the light bulb weakens under a condition, of its synthesis light beam output to specific proportion. This proportion generally is using in is outside the photosource is 70%, thereupon in the photosource like daylight lamp is 80%.
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Always kind |
lm/W |
White light bulb |
15 |
LED Light bulb |
60 |
Quartz halogen bulb |
25 |
SL Province electrical form fluorescence light bulb |
60 |
Mercury vapor lamp |
65 |
Ordinary fluorescent lamp tube |
70 |
PL Fluorescent lamp tube |
85 |
PLC Fluorescent lamp tube |
85 |
Quartz negative metal lamp tube |
90 |
Three wave lengths natural colors province electric lamp tube |
96 |
High-pressured natrium gas light tube |
130 |
Low pressure natrium gas light tube |
200 |
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