Discussion
Three of the following are reasons to reject a lamp of high efficacy for a particular room. The exception is
Answer: B
Correct answer: its lumens per watt are higher than the incumbent's
Higher efficacy is the reason to choose a lamp, not to reject one. The other three are genuine grounds for rejection: a long restrike leaves the space dark after a momentary interruption, poor rendering fails the task, and incompatibility with the existing controls costs more than the lamp saves.
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