I was able to test the Patona Energiesparlampe free of Testberichte.reviews! 20W, 1318 lumens! She makes a very bright great light. Is immediately bright. A pleasant warm light. They should have a service life of about 8000 hours.. , In the technical data is 8000 hours and above in Amazon:. Operating hours 50.000 h / h What now is right.? I like the shape of the energy saving lamp. In particular, the energy savings: up to 90%! She brings a brightness of comparative value to conventional light bulb: approx 100W. That it is not dimmable does not bother me. The price of 9.95 Euro is OK