You can pull 3-4 oz of bud out of a newer midsize phototron with 3 small plants or 1 big one, but for the same investment cost you can setup an entire closet/tent and triple+ your harvests. They'd be alot more useful if they didn't cost so damn much. You'll spend close to a grand on one unless you find it used. I dick around with one I aquired but I do not suggest actually paying for one. If your broke and still have one, fuckit throw some soil/hydro in there and get shit started. If you have the money, do anything else:P If you google around for philcuisine, its a user name, you'll see trons put to good use.