T6 - HO Grow Lights - The Next Generation. T6 lamps fit into standard 24", 36" or 48" , T8, and T12 fixtures, and have standard bi pin connections. Universal wattage - 32 to 55 watt (48" lamps). T6 lamps work with T8 electronic ballasts, or for maximum output use T5 - 54 watt ballasts. We have both ballasts in stock.