Oh, I should add:

One of the little plants pictured is an aloe vera, and the other is a tomato. I put them in there, as the marijuana seeds are still germinating and haven't sprouted, so I can make sure that the lights are enough to at least sustain life right now, pending the 1000W HPS light.

I read that tomotoes and cannabis, not only look like eachother, but also have similar light requirements, so I figured it would be a good test pilot so I wouldn't waste an entire crop experimenting.