Lamp Lumen Depreciation, LLD (Lighting)
Lamp Lumen Depreciation, LLD (Lighting) : Information about the chosen lamp and its lumen depreciation and mortality are available from lamp manufacturers' literature. Rated average life should be determined for the specific hours per start; it should be known when burnouts occur in the lamp life cycle. From these facts, a practical, group re-lamping cycle should be established. Based on the hours elapsed to lamp replacement, the LLD factor can be determined
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