In addition to the natural aging illuminance of the lamp itself after 3,000 hours of ignition, the illuminance is reduced by 10% to 25%. Due to the adsorption of dust, the illuminance is reduced by 20%. Therefore, cleaning the lamps and classroom walls regularly to ensure the normal luminous flux output of the lamp, thus saving energy. Quite important. For the new teaching building, the lighting control system should be reasonably designed according to the needs. The cost effect of the light source and the lighting used for lighting should be considered as the best, based on the lowest annual cost, rather than the minimum initial investment. Lighting fixtures and electrical accessories with high luminous efficiency, long service life, low maintenance and repair costs, and stable performance.
Considering the full use of natural light, the installation of the luminaires is preferably parallel to the side windows so that artificial fill light is applied to the side farther from the window when needed. In short, school lighting should be able to achieve 20% to 35% energy saving effect in the annual operating costs by modifying the lighting control system and selecting energy-saving lighting fixtures under the premise of ensuring reasonable illumination.
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