From what I hear, the LED lights are actually not any brighter, they just have a more direct coverage area so to speak.
Annd they do have LED replacement bulbs and LED panels that you can install... I don't have the info handy, but I do remember this being brough up before, and was all excited about the posibilities until I found out that they weren't any brighter...
I think if you seach foor LED light replacement or similar you should be able to come up with a few sites with this info... something like LED.com or? I can't remember? Try: http://www.superbrightleds.com/1157.htm
I think this may have been the site? Read their disclamers etc...
Still would like to try them anyway! If anyone does... please let us know how it works out!