Caution: LED driver / toroidal transformer required!

Note when ordering the lights please be sure: The G4 LEDs must be used with an LED driver. Main transformers may damage the lamp. That's what happened to me, and the opinion of the supplier sebson was (quite correctly): "Unfortunately, you can not take advantage of our 24-month warranty use, as we refer to our product pages on in this case that the G4 LEDs with an LED must be used driver. We ask for your understanding. "
So I was able to take at themselves and say: Who can read, is a clear advantage. This agrees with the product pages namely (last line of detail), and the packaging is: ". Use with LED driver, electronic driver can damage the lamp"
The brightness is really like 20 W, the warm white color. The product is fine, so full marks, but see above.