I can connect the LED reviews my predecessors basically. I long for powerful LEDs to convert my halo radiator (6x20 watts) sought and then decided to go for this. At first I wanted a mixed operation 3x plus 3x LED halos with existing Transformer 60-120 Watt. After a few hours of operation with excellent lighting but the transformer went crazy, heaven knows why. During the day everything is OK, then all night spots began to flicker. After several days of pondering, I decided to look for a new transformer, fit the specifications and installation dimensions. I then find anything and have ordered a LED transformer MEXLITE 24W 12V DC 2A. With this transformer, the well-matched by the installation dimensions in my radiator plate, I decided at the same time for a complete conversion to LED of eSMART (6x3,5 watts). The conversion is carried out, but with significant structural problems, because I did not get the old transformer out, is very firmly glued. The new addition had so into it, while it was of course very closely. (E-hobbyist-laity should stay away from such action!) Now it's done and everything works very well initially with 3 LEDs. The other 3 LEDs are ordered. The LEDs really provide a very good light similar to daylight. However, I would say, rather than 30 watts 20-25. Certainly in this impression and the LED beam angle of 60 degrees to play a role. The total cost of the conversion about 100 euros and a lot of effort !!! the transformer change. But one could also buy a new lamp. For the LEDs I would first like to forgive because of insufficient experience and also because of the relatively high price, 4 points. Buying these LEDs I would definitely, for lack of better offers highly recommended.