well i use a dr90 which is only the bottom bit but that propagtion area is wicked....
i have a 600w air cooled dimmed to 400 and 600 wen i can ....so 600 4-5 days out of the 7....
i veg till there 12" tall and put them in 11 litres square pots put 9 pots in the tent... and get roughly any were...