Green lighting is an energy-saving, environmentally-friendly, and beneficial way to improve people's production, work, learning efficiency and quality of life, and to protect physical and mental health.
2, visual work
In the work and activities, the observation process of the details and targets presented in front of the background.
3. Luminous flux
Light metric derived from the effect of radiation on a standard luminosity observer. For Ming Vision there are:
Wherein the spectral distribution of dΦe(λ)/dλ--radiation flux;
ν(λ)--spectral light (visual) efficiency;
Km - The maximum value of the spectral (visual) performance of radiation in lumens per watt (lm/W). In the case of monochromatic radiation, the Km value under bright visual conditions is 683 lm/W (when λm = 555 nm). The sign of the quantity is Φ, the unit is lumens (lm), 1lm=1cd/1sr
4, luminous intensity
The luminous intensity of the illuminant in a given direction is the quotient obtained by dividing the luminous flux dΦ transmitted by the illuminant in the solid angle element dΩ in the direction by the solid angle element, that is, the total energy of the unit solid angle is:
The sign of this quantity is l, the unit is candela (cd), lcd=1lm/sr
5, brightness
The amount defined by the formula dΦ / (dA · cos θ · dΩ), that is, the luminous intensity per unit projected area, the formula is:
Where dΦ--the luminous flux propagating within a solid angle dΩ of a given direction transmitted by a beam element at a given point;
dA--including the beam cross-sectional area at a given point;
Θ—the angle between the normal of the beam section and the beam direction.
The sign of this quantity is L, the unit is candela per square meter (cd/m2)
6, illuminance
The illuminance at a point on the surface is the quotient obtained by dividing the luminous flux dΦ of the person on the bin containing the point by the area of ​​the bin dA, ie:
The sign of this quantity is E, the unit is lux (lx), 1lx=1lx/m2.
7, maintain the average illuminance
The average illuminance on the specified surface shall not be lower than this value. It is the average illuminance on a defined surface at the moment the luminaire must be maintained.
8, reference plane
A plane that measures or specifies the illuminance.
9, the work surface
A plane that works on its surface.
10, brightness contrast
The ratio of the difference in brightness between the object and the background in the field of view to the background brightness, ie:
Where C--brightness contrast;
ΔL--the difference between the brightness of the object and the brightness of the background;
Lb - background brightness.
11, identify the object
Identifyed objects and details (such as points, lines, scars, stains, etc.) that need to be identified.
12, maintenance factor
The ratio of the average illuminance or average brightness obtained by the illuminating device on the same surface when the device is illuminating under the same conditions after the illuminating device has used a certain period of time.
13, general lighting
Uniform illumination set to illuminate the entire venue.
14, partition general lighting
For a particular area, such as the place where the work is done, different illuminations are designed to illuminate the general illumination of the area.
15, local lighting
Illumination for a particular visual work that is set to illuminate a part.
16, mixed lighting
Illumination consisting of general illumination and local illumination.
17, normal lighting
Indoor and outdoor lighting used under normal conditions.
18, emergency lighting
Illumination enabled due to power failure of normal lighting. Emergency lighting includes evacuation lighting, safety lighting, and standby lighting.
19. Evacuation lighting
As part of emergency lighting, the illumination used to ensure that the evacuation channel is effectively identified and used.
20, safety lighting
As part of emergency lighting, it is used to ensure safe lighting for people at risk.
21, standby lighting
As part of emergency lighting, lighting used to ensure that normal activities continue.
22, on duty lighting
Non-working hours, the lighting set for the shift.
23, guard lighting
Lighting for warning installation.
24, obstacle lighting
A sign light installed on a building or structure that may endanger navigation safety.
25, stroboscopic effect
Under the illumination of light with a certain frequency, it is observed that the motion of the object exhibits a phenomenon different from its actual motion.
26, light intensity distribution
The curve or table is used to indicate the luminous intensity value of the light source or the luminaire in all directions of the space, also called light distribution.
27, the luminous efficacy of the light source
The luminosity obtained by dividing the luminous flux emitted by the light source by the power of the light source is referred to as the luminous efficacy of the light source. The unit is lumens per watt (lm/W).
28, lamp efficiency
Under the same conditions of use, the total luminous flux emitted by the luminaire and the total luminous flux emitted by all the light sources in the luminaire are also referred to as the luminaire light output ratio.
29, illumination uniformity
Specifies the ratio of the minimum illuminance to the average illuminance on the surface.
30, glare
A visual phenomenon that causes an uncomfortable feeling or a reduced ability to observe a detail or target due to an unfavorable brightness distribution or a range of brightness in the field of view, or an extreme contrast.
31, direct glare
The glare produced by the illuminant present in the field of view, especially in the direction of the line of sight.
32, uncomfortable glare
A glare that produces an uncomfortable feeling, but does not necessarily reduce the visibility of the visual object.
33, unified glare value
It is a psychological parameter that measures the subjective response of the light emitted by the lighting device in the visual environment to the human eye, and its value can be calculated according to the CIE unified glare value formula.
34, glare value
It is a psychological parameter that measures the subjective response of the outdoor stadium and other outdoor venue lighting devices to the discomfort caused by the human eye. The value can be calculated according to the CIE glare value formula.
35, reflected glare
The glare caused by the reflection in the field of view, especially the glare generated by the reflected image near the line of sight.
36, light curtain reflection
A specular reflection of a visual object that reduces the contrast of the visual object such that it is difficult to see the detail partially or completely.
37, lighting shade angle
The angle between the edge of the light source and the line connecting the exit of the lamp to the horizontal line.
38, color rendering
The effect of the illumination source on the color table of the object, which is caused by the observer consciously or unconsciously comparing it to the color table under the reference source.
39. Color rendering index
In a color-adapted state with reasonable tolerance, the psychophysical color of the illuminated object of the measured light source is compared with the psychophysical color of the same color sample illuminated by the reference light source. The symbol is R.
40, special color rendering index
In the color-adapted state with reasonable tolerance, the measured physical light illuminates the psychophysical color of the CIE test color sample and the reference light source illuminates the measure of the degree of psychophysical color of the same color sample. The symbol is Ri.
41, general color rendering index
The average of the CIE 1974 special color rendering index of eight sets of color samples, commonly known as the color rendering index. The symbol is Ra.
42. Color temperature
When the chromaticity of a certain light source (thermal radiation source) is exactly the same as the chromaticity of a complete radiator (black body) at a certain temperature, the temperature of the complete radiator (black body) is simply referred to as the color temperature. The symbol is Tc and the unit is open (K).
43, correlated color temperature
When the chromaticity of a certain kind of light source (gas discharge source) is closest to the chromaticity of a complete radiator (black body) at a certain temperature, the temperature of the complete radiator (black body) is referred to as the correlated color temperature. The symbol is Tcp and the unit is on (K).
44, the amount of light source maintenance rate
The ratio of the luminous flux of a lamp after a given ignition time to its initial luminous flux.
45, reflectance
The ratio of the reflected radiant flux or luminous flux to the incident radiant flux or luminous flux at a given state of the spectral composition, polarization state, and geometric distribution of the incident radiation. The symbol is Ï.
46. ​​Lighting power density
Lighting installation power per unit area (including light source, ballast or transformer) in watts per square meter (W/m2).
47. Chamber shape index
A value indicating the geometry of the room. Its calculation formula is:
Where RI--ventricular shape index;
A--room width;
B--room length;
h--The luminaire calculates the height.
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