... And then lit up 3/4 of the LED modules ...

Gained I wanted to save energy the 20W low-voltage halogen lamps our NEFF extractor hood (total 4 pcs. Installed) Replace in the kitchen, I looked for the appropriate number of Goobay 30334 LED Chip for G4 base with 10 SMD LEDs Light color white LED G4S white , In extractor I have not exactly looked what was built for Versorging the lamps, due to the year of manufacture of the trigger (Bj. 2004) However, I have strongly believed that a magnetic transformer is installed.
The LED modules supplied as usual fast, the same day I have the bulbs still replaced.
Fortunately, ran the pure installation without complications, the LED modules fit precisely into the reflector of the luminaire without these had to be reworked and the glass cover could still be mounted. At this point I would also like to point out that relatively large components on top of the module. Another customer has written in this regard a detailed review, so please check first and caution how much space in the luminaire.
When replacing the last halogen bulb, however, I had to notice that all 4 bulbs began to flash. Probably an electronic transformer in the extractor is therefore yet installed, which does not come with the low power LED bulbs cope. For this reason I had a 20W halogen lamp left in the fume hood, fully equipped with 4 LED modules would not have worked. But at least I achieved a saving of 50W power input via the 3 LED modules ....
The LED modules Sinde something cold and white as the 20W low-voltage halogen lamps. When lighting the cooker which is in my opinion not really a problem, although I am a better coordinated light color to the normal halogen lamps would like better.
Conclusion: I have to buy not regret it, two points from there, because in the product description at all is not an indication that the LED modules may not work with the existing transformer. Just let this risk without corresponding product Note the customer, I do not really satisfactory. This can in extreme cases, namely also mean that acquired LED modules do not work with a customer.