So I finally finished installing the 2011 headlights on my '06 IS250 with factory halogen. I've had them installed for about a month now, but was waiting on the part to connect the LED strip to the rest of the harness which my dealership finally got this weekend after weeks on backorder.
I purchased both headlights used via eBay along with new D4S bulbs, a ballast (one of the headlights came with a ballast), and new covers since the 2 sellers I purchased the headlights from didn't include any covers. Total cost = $1200. I'm hoping to sell my old headlights for a couple hundred on eBay, so that should bring the total cost down.
If anyone is wondering, it was obviously not plug n play at first. I had to splice and relocate wires on the harness connector to get the LED strip to work. Also, the reason the high beams aren't functioning as DRLs is because I had my dealership disable them.
Sorry for the closeup pics. I took the pics using my iPhone so when I backed up anymore than I did all the camera would show is a ball of light on each side. Also, the LED strip is not as yellow as the pic makes it seem. It's actually white with a very slight bluish hue.
EDIT: Don't let the photo deceive you. These are actually the LEDs at 50% brightness. They didn't look nearly as bright as the iPhone camera made it seem.
These are also the LEDs at 50% brightness, taken less than a minute after the first pic. You can clearly see what light does to the iPhone's crappy camera.
This is a few weeks afterwards once I figured out how to get the LEDs up to 100% brightness. The passenger headlight at 50% brightness, the driver headlight at 100% brightness (they're now both wired for 100% brightness BTW).
FYI - I explain the correct wiring on page 7 of this thread.