oh then go for it! I grow herbs year round too, but I just put them under a couple cfls on my kitchen table usually (pick when needed type deal) but I'm sure if you need a decent amount then they would blow right up under an hid light.
edit* parsley is super easy to grow btw, it pretty much needs nothing but waterand light (not litterally) but as far as plants iI dont have to touch those aee pretty high on my list.