This light bulb I bought for our LUCEPLAN Titania hanging ceiling light after a long search and several bad buys. It is obvious the only energy-saving lamps suitable for this lamp that can replace in fits and the original 100W halogen lamps. The disadvantages of Megaman 23W were largely aware of me. Unfortunately, the brightness of the backlight is not comparable to 100W halogen. The Megaman is much darker and has a different coverage. In addition, and that bothers me especially - you have to know that the Megaman Liliput after power is very dark and multistage min burning time reaches the final brightness after about 10. That would not be troublesome if the light comes on without interruption - in a dining room, as ours, the Megaman is therefore hardly useful einzustzen, since one light always an - on and off. If the lamp burning all day, so the energy savings benefit would not exist .... But that probably remains our problem - and is not the manufacturer's fault ...