Holley Retrobright Price Match

I'm guessing you've never called their tech line. :p
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@slantsixdan is more passionate about lighting than most of us are about Mopars. It's his consuming passion and life's work. His recommendations are spot-on, so if you really want to upgrade I'd suggest contacting him. He's very helpful and friendly, and there's never pressure to buy from him. His attitude seems to be "I am going help this person. If they happen buy something, bonus." In fact, he recommended I try a relay upgrade with halogen sealed-beams first, before committing to the Koitos I bought from him for both my Challenger and Valiant. His expertise and assistance is well worth the expense.

Lol, fair enough. And I definitely can see Dan's knowledge on stuff. A lot of my questions are largely just curiosity and for my own learning and knowledge. I've built my own wiring harness for my car from scratch using a scrap harness I got at my previous job because I wanted good modern wiring with quality insulation and fresh terminals on all the connections. That alone fixes a lot of dim lights and flaky operation. I added several fuses and relays along the way as well for higher current loads like headlights. The only harness in the car that is still original at this point is the one that goes back to the tail lights of all things. I just didn't have long enough cables to make that run with my new wire, and I didn't want to splice things together to get there, so I left it for the time being.

I actually had the opportunity to read some FMVSS 108 / DOT testing reports on headlights as well when I was at my previous job and we were looking at replacing the current LED headlights we were running with a lower cost option, so I'm a bit familiar with what the report actually looks like and what they test for. I've seen my fair share of YouTube "lights aimed at a wall" videos to know and understand that that doesn't tell the full story when it comes to how lights are tested at a certification level. I think the thing that's harder for me to remember is that the US standards aren't necessarily great as I don't believe they have been changed for a very long time. I've seen "first world" brands that offer LED headlights now like Sylvania and Philips, which you would kind of hope actually make quality products (and actually make them themselves, not a rebrand). I would hope these guys are actually making stuff that really does meet the DOT/FMVSS criteria, but sounds like maybe they just don't perform that well. So in my head it's just weird to hear "this premium brand stuff is junk while this brand I've never heard of makes really nice stuff". I definitely trust him given his wealth of knowledge on the subject. I'm just an engineer so I like to see numbers and data as opposed to "these and good" and "these are junk". I like seeing what makes them good or bad.