US to allow adaptive beam headlights on new cars (Page 2/2) theogre FEB 22, 09:01 PM I had to replace "wreck" Very basic aero HL for 2 cars w/ halogen HL and standard park, turn and mark bulbs... 1 had to get New OE assem cost > $500(US) 1 got a used part and still cost > $250 OE HID or LED HL, or even a Halogen HL w/ LED for park turn mark DRL just get higher prices. Shelling out $1000+ (US) per side for replacement is common now. "But LEDs last longer..." Most times Only on Paper. Example: A lot of Prius and others have Bad LED taillights, 3rd brake, markers and more but most people don't see that. Worse Many Ignore them until Fails Inspection or gets a Ticket. PRICE to replace a LED taillight assembly is far higher because high $ part Plus likely Labor $ because many OE LED are Not easy to replace by DIY crowd. As to LED HL... All LEDs must be wired in Series for low and high beams per DOT FMVSS rules. Unlike taillights etc that can have a part failure, 1 LED in a HL dies then All dies for whichever beam. Then add motors etc for auto leveling, Drivers for LED HL, and those parts are not available but as whole HL assem. Note that "adaptive beam headlights" covers several options like Auto High Beams have been around since '60 '70 in some Cadillac models. That uses a photo cell and control knob to setup a relay to switch beams when the cell "sees" other headlight point to you. That has always been legal because you can turn off the feature and switch manually as needed like everything else. I've driven cars w/ this but has limited use. Is good for "country roads" or late a night w/ low traffic where don't switch beams a lot but prevent forgetting to dim for others. I generally hate MOTORTREND but tell some ways they mean... And covers high cost to fix. https://www.motortrend.com/...eadlights-tech-work/