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An efficient replacement for 13w cool white fluorescent bulbs, these LED bulbs are bright, flicker-free, and use only 9w. I got tired of the way my old fluorescent bulbs would flicker when first turned on, as they aged. These LEDs should never do that.
When installing be aware that, unlike fluorescents, these bulbs emit no light on one side ( they shine about 330°-335° around the 360° tube). You’ll want to install the dark side against the top of a ceiling mounted fixture, or against the back of a wall mounted fixture.