Using group relamping, all lamps are usually replaced when they have reached what percentage of rated life expectancy?
A) 20-30%
B) 40-50%
C) 60-80%
D) 70-90%

Question

Quizplus · Accepted Answer

Group relamping involves replacing all lamps in a system once they've reached 60-80% of their rated life expectancy, optimizing maintenance efficiency and ensuring consistent lighting quality.

Using Group Relamping, All Lamps Are Usually Replaced When They