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Example 4. A minimum illumination of 80 lumens/m is required in a factory shed of 100 m x 10 m. Calculate the number, location and

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Example 4. A minimum illumination of 80 lumens/m is required in a factory shed of 100 m x 10 m. Calculate the number, location and the wattage of the units to be used. Assume that the depreciation factor is 0.8, coefficient of utilization is 0.4 and efficiency of the lamp is 40 lumens/watt

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