I know that LED lights are becoming more and more popular for cars, especially for tail and brake lights (I seem to recall reading that the brighter LEDs cause people to react some-tenths of a second more quickly), but I would like to register a complaint: They’re freaking annoying.
I’m sure they’re phenomenal in the rain or at a distance, but they’re murder in stop-and-go traffic, especially in the dark. I was following one of those stupid “mini-SUVs” (I’m sorry, but they are) on the way home tonight and I was getting blinded every time the driver tapped the brakes. Worse, he/she seemed to be having some sort of foot spasm at the same time, ’cause the lights would flash-flash-flash constantly. Good thing I’m not susceptible to epilepsy.
I finally had to back off far enough that I “invited” someone to change into my lane. Problem solved. 
I love the ultra-bright headlights on stupid SUVs. I drive a Honda Civic, so at night when I drive home from work I practically can’t look in my rear-view mirror for fear I’ll go blind because the lights look right into my back window. It’s really GREAT!