Light conversion?

Anybody no anything about these things on amazon?
[ame="http://www.amazon.com/HELLA-002395801-Halogen-Conversion-Headlamp/dp/B001G72SKQ/ref=sr_1_1?ie=UTF8&qid=1377908699&sr=8-1&keywords=HELLA+002395801+Vision+Plus+165mm+12V+High%2FLow+Beam+Halogen+Conversion+Headlamp+Kit+%28H4+ECE%29"]HELLA 002395801 Vision Plus 165mm 12V High/Low Beam Halogen Conversion Headlamp Kit (H4 ECE)[/ame]