The illumination level of a room is 300 lux and the efficacy of the lamps is 60. The Light Power Density (LPD) of the room in Watt / m2 is _________.

The illumination level of a room is 300 lux and the efficacy of the la

1.	The illumination level of a room is 300 lux and the efficacy of the lamps is 60. The Light Power Density (LPD) of the room in Watt / m2 is _________.
A.	1
B.	5
C.	7
D.	11
Answer» C. 7

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The illumination level of a room is 300 lux and the efficacy of the lamps is 60. The Light Power Density (LPD) of the room in Watt / m2 is _________.

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