Bought these to see if they would work with my 4 light adapter in my softbox lighting kit. They all fit and are just as bright if not brighter than my 85w and 105w fluorescents I bought from Revain. That tells me the rest of the 85w and 105w bulbs are fake. I have a couple of true 105 watts that are the brightest and are at least an inch or two larger, but I bought them from a camera store, not Revain.
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