The last set of fluorescent bulbs I purchased came with a 7 year replacement warranty. Of course, I would need to send a burned-out bulb back and pay postage, so on CFL's the warranty is nice, but its real value is a bit dubious once you count the cost and inconvenience. However, on a $40 bulb the economics improve since return postage would be a much smaller fractional cost of the individual light bulb. It is also much more likely that I would actually use the warranty on a $40 bulb than a $3 or $4 one. If Panasonic were to warranty this bulb for, say 19 years, I think I'd be game to try it.