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Works well, not only with larger recessed bulbs, such as BR6530, but also smaller sizes such as 50PAR20. The instructions don't call for moistening the suction cup before attaching it the bulb, but that is a trick I have always used for getting suction cups to adhere securely. The tab attached to the long string breaks the suction easily, so just be sure not to pull on it accidentally. Also, fits securely on the Mr. Longarm extension pole that I use for other purposes, like painting and window washing.