I had been made aware of these way back in 2003 by a co-worker with a Firebird. I bought the instructions and he built the kits. As I was on the road alot at that time and then started moving from state to state, I put them away til I could work on my car again. Going thru boxes this last couple of years has brought many things back to the surface and its time to do these things. Roger, I think that it will work with LED's but I'm not sure of that fact. Remember that these were developed long before LED's became common place in automotive use. I may try the led conversion lights and see what that does.