This has been something I've been debating for a long time myself. I haven't been able to choose between just putting in LED bulbs or replacing the entire assembly. I'm leaning toward the whole assembly because mine look fogged even after using a repair kit. For bulbs, I was considering Supernova V4. For the headlight assembly, I was considering the Truck-Lite LED headlights. Neither of these are cheap though. I think you would be wise to not buy cheap eBay/Amazon/Chinese bulbs or assemblies, because they are known to go bad in a short period of time or cause bizarre light patterns that look like high beams and are dangerous for other drivers.

 

This was actually covered recently in a discussion about LED headlights and foglights. The "Search" function is your friend.
https://www.hummerforums.com/forum/h...t-bulbs-32169/

 

Stock headlights and alla 18 dollar DRL bulbs.

Good stuff and the eyes of Megatron! Lol

DRL’s are as bright as headlights!
I am very happy with this bulb, very high quality, plug and play and built in anti flicker. 89 dollars and easy install. I can’t believe how much brighter they are.

 

Xenon replacement bulbs, all over Ebay, Amazon, etc.... Some have lifetime replacement warranty.