your t12s will be just fine for veg, 400watts hps is a standard size light for a small grow, as far as # of plants, it will be good for about a2x3-3x3ft space.(roughly)That should serve you well as a start up system while you learn the ropes & what type grow you preffer, soil is always a good way to start.Hi there i am a 1st time grower so basically dont have a clue what im doing! i have recently bought a Fluorescent T12 20 watt 2ft Cool white and a Fluorescent T12 20 watt 2ft Warm white light for veging, then i got told theyre no good and to buy a hps for veging? And also what sort of ammount of plants could you have under a 400wHPS? Also what is a good light to use for flowering?
Any help will be much appreciated
while it's true a hps can turbo veg a plant, halide is a better choice if your going to use hid for veg. You can use either for both stages, but hps is far superior to halide for flower. Flouros are great for veg, cheap to buy & operate. Also, you'll have the extra veg time while you flower under the 400!
Agreed. CFLs can be picked up relatively cheap and will blow what you have out of the water. A few 2700 and 6500 will work fine for a smallish grow. Shoot for 7k lumens per sqft. Any more is golden
Any more than 7k per sq ft (if a true measure) would probably be wasted. The sun, on a sunny summer day, provides 10k lumens per sq ft on earth. 7k would be a great day for a plant.
