1.

A fluorescent light source consumes 40 W electric power and has a luminous efficacy of 40 lm/W. Illumination in lux at a distance of 3 m from this light source is ______________

A. 175 to 180
B. 165 to 170
C. 75 to 80
D. All of the above
Answer» B. 165 to 170


Discussion

No Comment Found

Related MCQs