One of the easiest ways to calculate the required average illumination for rooms is with the lumen method. Lighting design is also accomplished by using the photometric data that is usually included in catalog product pages. They also specify interior and exterior lighting power limits. It is no secret that energy-saving light bulbs are the key, however, the DOE does also have mandatory lighting requirements for interiors and exteriors that involve controls, switching, and efficiency, including automatic shutoff. Energy efficiency requirements as specified by the U.S.This is important for both aesthetics and eye fatigue. Color and reflectance in rooms, determined by interior color schemes. ![]() Glare levels that should never be too harsh otherwise they might cause discomfort and even spark disorders.Illuminance is measured in foot candles (FC) or lux and 1 lux is the amount of light that strikes a one square meter surface when you shine 1 lumen from a 1-meter distance. ![]()
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