I think we are thinking about this way too much. Sure there are dangers with the cells. Drivers go bad and short. Could get hot. Maybe even get burnt. House could catch on fire. Isn’t that the same with OEM lights? I say go for it. Enjoy life. Do what you want. Tell the buyer purchases are at their own risk. Warranty only on workmanship. “Limited” Any signs of damage void warranty. 1 year or 6 months only. Offer repair work. Parts, labor and shipping to be paid by purchaser. Make a little buisness card with all the info. This is too easy. Maybe he will become the next Lumintop or .(add favorite manufacturer in blank.) Good Luck trailhunter.