Yeah. The issue with putting an LED in an HID housing is that the focal point of the projector bowl is made for the hot spot on the HID bulb. If that's out of spec you'll have fuzzy cuttoff, dim output, etc. I actually just rectified an issue that I had with a defective bulb with a funky hot spot. TRS Warranty FTW btw.
LED's should be in an LED specific projector. TRS should have a model out next year but they're still working on it.
LED tech just isn't where it needs to be to be a viable replacement for HID. Toyota's done some interesting stuff with the new Corolla, and even Acura now. The Europeans are really stepping up the game when it comes to LED output.
It'll take a little while for the aftermarket to catch up, just like it did with HID.
And Tony, for someone that's new to retrofitting, I would definitely tell them to stick with D2S or MiniH1's just for ease.