So right now i have the seedlings under a 250w. They've gotten about 1 1/2" tall in 16oz cups and working on their second leaf set now after 7 days. I'm using FF Soil and PH'd water, thats it. In my other room i have 2 600w HPS with a 4x6 screen. I only have about 3.5 - 4 feet from the screen to the bottom of the light. The screen is 10" above the 3 gallon pots. My question is, how long should i veg for? Or how tall? And should i transplant to maybe a 1.5 gallon before switching to 12/12? And can i use my HPS 1200w system on 24hrs to grow the plants without starting the flowering process? Thanks a lot guys - Grow journal coming soon!