There are some bulbs that require specific positioning... If the bulb is a vertical only bulb than.. well, you can only set it up vertically.

Best to double check if there's a reason as to why it is suggested to set it up the way they suggest to set it up, could be a good reason.
BobBong Reviewed by BobBong on . Question about HPS I have 2 50w HPS lights I'm gonna use (maybe a 3rd, and probably some cfl's as well). I got them from a hardware store, pretty cheap. I might invest in a 400w or so from HTG down the road, but for now I'm fine with this. Well thinking about how I'm gonna set it up, I came up with a couple of questions. First, if you look at the attached picture, that's basically what the light looks like (sorry I'll try and get some photos up if I can later). The grey part is the main thing, where the bulb Rating: 5