I cut my lights apart to add the halo lights from Oracle. It's not a task for the average weekend wrencher. I do suggest cutting along the seal with a razor type knife, slow and easy is the key, if you crack or break the lens your done. Another key to success is the right epoxy when closing, it needs to be as weather tight as possible.... good luck with the adventure, and I would suggest adding the halos while your in there! We love the look of ours!!!!