Join Date: Apr 2019
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A person's night vision does start to diminish in their 20's. it get's gradually worse from there.
At work someone bought a pile of LED headlights from Amazon to replace the H4656 sealed beams in the Kenworths. $20 ea. I did some research and found that any headlight that conforms to FMVSS standards (USA) will have "DOT" on the lens. These don't have that. The brand name lights, Grote and Trucklite, are $160 ea. There is a big difference in the quality.