::::::The problem is that the claim, by implication, is being used to support other claims in the rest of the paragraph which at one point states, "Rooms with frequent switching (bathroom, bedrooms, etc.) can expect much shorter lamp life than what is printed on the box."  Whilst I agree that the most likely time for a lamp to fail is when it is switched on, that premise alone does not support other claims made in the paragraph and there is still no evidence that frequent switching significantly shortens the lamp life.