Hello HAZE.
I've crawled tru the web discovering the benefits between Xenon (HID) and LED. But HID means to change my halogen type headlights and good HID are expensive (like every good stuff). So LED have me fall in love. They are little, cheap, reliable (so far) and even the ballasts (a 5cm box) fit all inside the Leon OEM headlights.
The light? Let me put it this way: Halogen Philips White Vision or Crystal Vision? Forget it!
If you want a PURE WHITE 6500K light (without blueish) these are excellent!!
A crisp, pure and solid white light and the pattern is exactly the same as halogen bulb. No need to ajust, no need to adapt, nothing, just plug and play.
In Portugal will pass MOT. Don't dazzle incoming traffic (tested yesterday with a friend).
I've drove less than a mile with it and the light output is better but doesn't go much more far than halogen. So HID's light array will get further and a good HID set will give more brightness.
But for a single plug and play the style becames like a modern LED Tecnology type of headlight.
I'll get some pics tonight and you'll see what I mean.
Regards