I just realized a few things.

If I need 160W, does that mean 2x 80W bulbs or 4x 40W bulbs will work? Does it stack like that?

I will probably be shipping the seeds to a friend using a prepaid card. It would be most convenient then to ship everything else to my home address. These sellers on ebay say they ship in discrete boxes. It seems like It'd be safe to order everything else directly. Bad idea?