I have taken now only 1 lamp in operation and will also report just about the brightness! Previously had a round (thick) 20 watt energy-saving lamp (1200 lumens) in use, but only very marginal fit in my ceiling light (cover was exactly on lamp). Therefore, I have decided on this spiral lamp that does not come over the dimensions of a "normal" light bulb out! Also, because they should have 1600 lumens and 400 lumens so over my vorheige lamp! Only 400 more lumens unfortunately I can find no means, at best, the brightness is the same, but rather slightly less than the 1200 lumens lamp. Can not technically show is just one visual impression. Otherwise, the delivery was fast and the packaging was sufficient. Therefore 3 stars!
