600w is where it's at it in the UK and also for efficiency.
600w are 6.7% more efficient than a 1kw and 16.7% more efficient than a 400w. 250w is even worse at 26.7% and it goes down quickly under 250w anything under 150w hps/mh will be less efficent than fluros watt for watt.
Commerical tomatoe farms in the UK use 600w lamps generally which is very telling.
600w are 6.7% more efficient than a 1kw and 16.7% more efficient than a 400w. 250w is even worse at 26.7% and it goes down quickly under 250w anything under 150w hps/mh will be less efficent than fluros watt for watt.
Commerical tomatoe farms in the UK use 600w lamps generally which is very telling.