unless the cfls are around 8 inches long then they are probably the equivalent of 250watts and also a 250 watt cfl will probably sell for around $90 canadian if i remember
michaelpeg Reviewed by michaelpeg on . Advice on CFL lights and ventillation please I have just invested in a grow tent with a floor area of around 3.5sq yds. I already have 2 x 250W CFL red spectrum lights. Is this enough for that area? I have read that plants also need some blue light when flowering, so could I use 1 x 200W CFL blue (which I already have) to boost the light levels, or would that be too much blue? I am confused about these lights. When they say 250W, do they mean their light output is equivalent to 250W, or do they use that much power? After buying the tent I Rating: 5