Why Most LED Headlight Upgrades Don't Really Work: An Expert Explains
jalopnik.com
jalopnik.com
I was using his advise when I upgraded my 240z headlights, a huge difference.
Older vehicles and Jeeps with sealed halogens where you can replace the entire bulb and housing as a unit can benefit from a switch to LED. There are recommendations at the end of the article.
Most of the article content explains why you can trust amateur reviews on the Internet or even your own eyes.
I also found the interviewee’s metaphor about why you can’t just swap the bulbs without replacing the housing as well to be particularly enlightening (it’s like swapping your glasses with your neighbors - doesn’t matter which frames look cool or that hers are glass when yours are plastic - the problem is that she is nearsighted and you are farsighted so her glasses are shaped differently for her eye and will never be able to serve their fundamental purpose for you: allowing you to see clearly).