We got some of those lightbulbs in a Christmas exchange one year--yeah, weird I know but that is for another thread!! LOL--anyway, we replaced the light in our hallway with one of them. That thing has been burning for like three years! We leave that light on all night and the whole time when we go on vacation. It is just as bright as any others. As I recall, the box said it was equal to a whatever watt, but just used less wattage to run.