Using both will actually benifit you. Just try to stay further on the 6500k side while vegging and the 2700k while flowering. Staying closer to the 6500k for veg will keep stretching to a minimum but make sure you keep them very close, without touching the plant.
jon420 Reviewed by jon420 on . CFL question So im getting 2 150 watt cfl's actual wattage and one in 2700k and the other is 6500k can i use both of these at the same time or do i have to use them one at a time like 6500k for veg and 2700k for flower hoping i can use them both together obviously for the extra lumens. sorry for sounding like a total noob Rating: 5