I am thinking about using conduit to make a light box hanger. The light box will be 30"x30", and it will be made of wood and have a 250w MH, two 24" VHO, and 2 24" T5HO in it. I am thinking about using two conduit from HD, and am a little confused about what size I should use. 1/2" conduit looks pretty thick and sturdy to me, and the 3/4" conduit looks massive. So I am thinking about using the 1/2", but saw everywhere else people using 3/4". Anybody has experience with this? Is 1/2" going to be too weak? Also I need 4 lines hanging off the conduits to hang the light box, and like to have something with clean nice look. Any suggestions? Thanks in advance.