
I bought this to replace a broken 1200 lumen fluorescent light in my bathroom. The turntables that came with the fan were nice and bright, but took a few minutes to reach full brightness. I looked for a replacement LED to eliminate this warm-up period, but nothing larger than 3.75 inches would fit. This 900 lumen bulb was one of the brightest of this length so I chose it as a spare. LED bulbs have a higher color rendering index, I thought it was comparable to a 1200 lumen twisting bulb and it worked fine. Life should be longer than fluorescent, so I'm very happy for this moment.