What are you talking about? It's on the front page. A T1 puts out about 932 PPFD at 12-16" in an 18x18. Get three of them and you cover something like a 3x3-4x4. Or just get a T2. A 600w HPS puts out about 900-1100 in a 3x3. The T1s I use (lights only) take 241w, 270 with fans. I'm talking about light wattage, of course. I highly recommend Tasty, and all other advertisers here, such as Johnson, Timber, and others. You could also DIY with parts from people like
@CobKits for cheaper, if you know how.
DO NOT BUY PLATINUM OR OTHER PANEL LEDS.
https://www.tastyled.com/