Thanks for the help alienwidow. So not even good for 1 dwarf low Ryder at a time?
not to flower. 4 ft, 2 bulb t8s will accommodate two seed trays under them. so if you want to run 150 clones under there it would be good, or like i said, start your vegetable garden under it which i do recommend.
I've run six bulb t8 4 ft lights and had plants veg nicely to three and a half feet and bushy, but those floro tubes just don't have the penetration that hid lighting provides for flowering. two low riders, 400 w hps. theres no rule that says you can't veg under an hps just because the spectrums not perfect. I'm vegging under them right now just because i ran out of room under my 4 ft 6 bulb t5 hos.
the problem with buyng a light that you think might just cut it is that you usually have to buy twice. i started small too, leds, t8s, floro pig tails, 600s. if you have the space just bite the bullet and get a double ended 1000w and giver. if not get whatever the footprint you want to cover will handle. 4x4 for a 600w, and 5x5 for a 1000w.