400watts at most although a 250watt sounds more realistic....these two without the usage of a cooltube......with a cooltube connected to an extractor fan i would use a 600watt but it would seem a bit excessive



NGOS
newgroweroldsmoker Reviewed by newgroweroldsmoker on . PETE ROSEZZZ IF YOU WAS TO HAVE A GROW BOX AT THE SIZE OF 2 1/2 X 2 1/2 X 4 1/2 WHAT WATTAGE OF HPS AND MH WOULD FIT . Rating: 5