Utilization of Electrical Energy Lamps and Bulbs

A room of dimensions 12 m × 16 m is to be lighted by 24 lamps of uniform illumination of around 100 lm/m2. If the output of each lamp is around 1600 lumens, what will be the utilization factor of the room?

1
0.4
2
0.6
3
0.45
4
0.5

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