Dunno if anyone mentioned it except in passing, but all you need is one jackass to damage the light, end up sticking it in his maw instead of using a headlamp, and end up having it go supernova and blow off half his jaw.
Even if you’d do the work at-cost or even for free (ie, gifting the lights), you could get sued into oblivion.
At least if you bought it untouched and gifted it, not putting your stank on it at all, you could (possibly) be cleared.