I have a 5 light bulb with a dimmer. I needed brighter LED bulbs than the ones I had. When I replaced a lightbulb with this 100w Sunlite lightbulb, it worked perfectly along with 4 other lightbulbs from DIFFERENT manufacturers. When I replaced the SECOND bulb with the exact same Sunlight bulb, the dimmer stopped working. The lightbulbs flickered and did not go to maximum brightness. I had the same experience with 100 watt CREE bulbs - the two didn't work together in the same fixture. So now I have a Sunlite, a CREE and three other, less bright (I don't know which brand) working together. I think I should try a third brand and see what happens.
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