With these LED lights, I finally found a product to its operation I got used for decades: the comfort of a light bulb - turning and it is light. Finally the right light in the apartment and still save energy? Who does not want that, especially with retrofitted LED's neighbor is really envious! But before you have to overcome a power saving inhibitions: the least five times as high purchase price.. In different rooms I have replaced some time ago the lighting. The electricity bill could be so successful in fact reduce. Once less went into the restaurant, but rather bought a set of lamps, finished. To find the right LED's for me, I stayed on the lumen number. A 40-watt light bulb lit with about 400 lumens. A 60-watt bulb with 600 lumens. Burns a 25-watt light bulb for 5 hours day, they consume about 46 kWh per year. At an electricity price of 0.26 € / kWh, gives the annual cost of 11.86 Euro. A similar 5.5-watt LED lamp with 400 lumens, however, would only about 10 kWh / year consume at the same time. Power 2,61 euros per year. I have replaced 4 light bulbs. If so about 37, - Euro save. The purchase price of the 4 lamps was about 32, - Euro. From experience I can say that all my other sebson LEDs for some time as a year shine. So far I had no failures. My conclusion: I'm thrilled.