The ground wire goes right to the metal of the fixture itself. If nothing else, just find an internal screw of some sort and attach it to there. The big thing with the ground is so you don't get a shock when touching the fixture itself.

Have a good grow!:jointsmile:
Psycho4Bud Reviewed by Psycho4Bud on . no ground wire hey guys, i just wanted to ask a question about wiring. I have a setup and it works first of all. I just wanted to ask my light fixtures dont seem to have a ground wire but my heavy duty extension cord does. I therefore have not hooked up the ground wire (green) but just taped it off while the black and white wires between my lights and plug are attached and taped up. Now my set up works, but does this present a hazard without a light fixture with a ground wire? thanks, Rating: 5