
I haven't had these bulbs long enough to know anything about their lifespans but I have the same lower wattage bulbs and they last very well so I expect the same from them. This 18 watt light is quite bright, I would say at least the 100 watt equivalent, and the light is pure white, bright and glare free and appears to offer excellent color rendering on subjects. In fact, due to their design and construction, they don't throw as much light down as an ordinary old-fashioned incandescent bulb. The large plastic cup that forms the base prevents this type of light spread so it may not be the best style for a reading lamp, sewing lamp etc. Otherwise a great lamp, energy efficient, durable and not very expensive.

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