Sadden is right on all counts. Pay especially careful attention to where he says
OEM headlamps, that is original-equipment parts, the ones sold by the maker of your truck. All—yes all—of the aftermarket replacements (Depo, TYC, Eagle Eye, Diften, and a whole lot of others) are unsafe junk no matter how loudly (and fraudulently) they babble about "OEM quality", "NSF Certified", "DOT/SAE approved", etc.
Lens pitting severely degrades the headlamps' performance and increases their glare. If replacing the lamps isn't on the budget for now and you need to keep going with the ones you have, you can improve them somewhat with
this technique.