1.0.1 This standard is established to implement the national laws & regulations and technical & economic policies in architectural lighting design, to meet the building function requirements so as to be conducive to economy and rationality manufacturing, working, study, life and physical and mental health, to realize the advanced technology, economic rationality, usage safety, energy conservation and environmental protection, maintenance convenience and to improve the application of green lighting.
1.0.2 This standard is applicable to lighting design of constructed, renovated, extended and decorative residential buildings, public and industrial buildings.
1.0.3 The architectural lighting design shall not only comply with the requirements of this standard, but also comply with those in the current relevant ones of the nation.
2 Terms
2.0.1 Green lights
The lighting which can conserve energy, protect environment and physical and mental health, and be beneficial to improve people's production, working, learning efficiency and quality of life.
2.0.2 Visual task
The process to observe the detail and target presenting in front of the background during work and activity.
2.0.3 Luminous flux
The derived luminous quantity according to the effect of radiation to standard luminance observer, lm, 1lm=1cd?1lsr. As for photopicvision:
Ф=Km V(λ)dλ (2.0.3)
Where,
dФe(λ)/dλ - the spectrum distribution of radiation flux;
V(λ) - the spectrum (view) efficiency;
Km - the maximum of radiant spectrum (view) efficiency, lm/W. Under photopicvision condition, Km=683 lm/W (λ=555nm).
2.0.4 Luminous intensity
The luminous intensity of luminophor in assigned direction is the quotient of the luminous flux dФ transmitted within the solid angle element (dΩ) in this direction divided by such solid angle element, namely the luminous flux of unit solid angle, cd, 1cd=1lm/sr.
2.0.5 Luminance
Calculated according to L=d2Ф/(dA?cosθ?dΩ), cd/m2.
Where,
dФ- the luminous flux transmitting from the light beam element of assigned point, including those within the solid angle (dΩ) in assigned direction, lm;
dA- the sectional area of beam (including assigned point), m2;
θ- the included angle between normal line of beam section and beam direction.
2.0.6 Illuminance
The quotient of luminous flux (dФ) shooting on the surface element containing this point divided by the area of this surface element, lx, 1lx=1lm/m2.
2.0.7 Average illuminance
The average illuminance value of all points on the specified surface.
2.0.8 Maintained average illuminance
The average illuminance on the specified surface where the lighting device must be maintained.
2.0.9 Reference surface
The surface for measuring or specifying the illuminance.
2.0.10 Working plane
The plane for conducting work on its surface.
2.0.11 Recognized objective
The object and detail needs to be recognized.
2.0.12 Maintenance factor
The ratio of the average illuminance or average luminance on the specified surface after a certain application period of lighting device to the average illuminance or average luminance on this specified surface where this device is newly assembled under the same condition.
2.0.13 General lighting
The uniform lighting set for illuminating the whole area.
2.0.14 Localized general lighting
The uniform lighting set for illuminating a certain specific area of workplace.
2.0.15 Local lighting
