Showing my ignorance here - but what are LED's? Does anyone know the web site referred to above?
LED's are whats referred to as "Light Emitting Diodes", hences, LED
They are solid state, a spin off from the transistors if you will and, in general, have a life cycle of 100,000 hrs or 10yrs. In some of the newer Airstream models the taillights are now completely LED
. The lights emitted from LED can be seen as brighter than the regular light bulbs. Since they're solid state, the power LED's consumed is much less when compared to the regular light bulb.
You're gonna see alot more about them in the years to come.
Here's a great place to start for a general background of products and, info..
Started an excellent thread on the subject~LED Clearance/Marker lights
You might want to read it as well as check the numerous links to other sites linked on that thread..
I hope this was of some help for you~