Great info, That is why I went with a brand that is Local based in Utah.I went through a lot of investigation before getting LED's. The cut-off is a key to not blinding people. While not going into specifics a few comparative reviews found on line showed that only about 5% of the LED's on the market have good to very good hotspot cutoffs. I went with the Vison X Vortec units. Morimoto's sealed unit for the TJ was my second choice. Overall, the best performing LED's are not the ones with the most lumens. Lux at distance is what's important as is beam pattern.
It takes more expensive LED emitters and a lot of lens design time to get a good cutoff and light focused on the road. Most of the ones that do a good job at this are over $500 a pair.
After installation I actually have less light in the eyes of on coming traffic but a lot more light on the road.
Here's a good place to start....
https://code4ledsupply.com/
These were $200 a pair, so not $50-75 cheap amazon import which the youtube video mentions.