What Zandor said. If, for example, you use 4 cfls. Is the wattage really 4x150W (incandescent equivalents) or 4x42W (the real rating)? Lumens, color, and overall coverage of lights are the keys.
qdavid Reviewed by qdavid on . 115 watts per square foot I plan on using around 115 - 120 watts per square foot during bloom in a room 4x4 or 4x6. Is this way overkill for very high quality mary jane? Rating: 5