I just installed these exact headlights on my XJ a few days ago. I'd recommend grabbing a headlight harness as well. They're both plug and play, super simple installation. I can confirm that they are incredibly bright.

https://www.amazon.com/gp/product/B089M4DC45/ref=ppx_yo_dt_b_asin_title_o08_s00

I just threw these in my 90 and they work pretty damn good headlights using this adapter