I bought a pair of these to replace the 100 watt incandescent bulbs in my 30 x 30 foot shop. I bought two with the intention of possibly buying two more to replace the other two bulbs. After installing the ones I bought, the light gain wasn't great enough to justify buying two more. At Revain, the images of the lights above the cars in the garage give the impression that the lights are almost the size of a ceiling fan. Instead, the two-pack they arrive in easily fits in my mailbox. If you look at the last image in the series, you can clearly see the actual dimensions of the lanterns on it. I should have looked more closely. Guilty. In any case, these things are fine and can light up a small garage. For a 900 square foot store with 11 foot tall rafters, they really don't do the job. I also don't think four of them would have done it for me. Probably better than 4 bulbs but slight improvement at higher cost. They were very easy to install - just unscrew and screw in the old bulbs to replace (make sure you remove the plastic cap at the end first).
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