Ya, their just bagseeds. Nothing wrong with testing in the beggining. Give you a good idea of what's to come

16inches, I'm guessing they are either 15W or 20W bulbs. That's a guess. I can't see them being anymore or any less. I see 2 of them in the picture? Is that right? If so, if you want to succeed or have any fun with this, just keep one plant under that light. Having 3 or 4 of them, they may not survive. Just a thought. Good luck!