Where can you buy the 4x4 sog trays or w/e

hgt supply doesnt have them or im i missing something?

any other good sites that have them

and how many klone can u fit on one 4x4 tray
or how many should you under 1 600 watter?

Here you go bud (http://www.greners.com/i/hydroponics/components/trays-flood-tables.html). They are called flood trays. 4x4 is perfect for a 600w light. As for how many plants; kinda depends on how big you are growing them. SOG in 3 gallon pots I would say 16. If you go with smaller plants/pots I would say up to 25. Best of luck bud.