Excellent article, and it re-affirms my dislike (hatred, actually) for aftermarket LED bulbs in headlights not designed for them. Plus, as stated, they produce less useful light.
Less useful light? I put a pair of LED's in my Dodge pickup last year. Dodge's are famous for their poor OEM lights. The LEDs at least doubled the light output. For the 1st time, I can actually see the road. There's a very noticable cutoff at the top of the low beam and I've never had a car flash it's lights at me.
