i have two 70 watt HPS, an two 24" t5 10000k for my flowering room, and a 4' 4bulb t5 fixture with 2 actinic blues and 2 10000k for my vegging room, both well venilated, controlled temp. only have 2 apollo 11 an 1 OG kush in the flowering room now about 24 in. tall, and one purple star as well...