RichardKing8632 RichardKing8632

07-02-2024
Physics

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A lecture hall which measures 60 m×24 m has a certain nuinber of larnps or which each has a lighting deugg lumen (LDL) vutpat of 18000 lumens. The illemination required for the lecture hall is 2000ux. The mounting height is 4 m and the spacing to mounting height ratio is 32 .Taking utilization factor and maintenumee factot is 0.4 and 0.75 , find the total number of lamps:

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