400w. hps. , a cooltube and 1 good 6in. blower = vortex / hurricane like 450 cfm. so it's strong enough to cool lamp and vent growspace both . You'll be much happier w/ your yields .
Peace
Crispi :jointsmile:
xcrispi Reviewed by xcrispi on . Choosing between two envirolite 200w and one 400w hps High, I'm thinking on growing seven lowryder no.2's, couple of questions on lightning... Will be using 24 hrs for max yield. I have two choices: Buying first one 200w envirolite with white spectrum(for veg), using it until flowering starts, then buy another 200w envirolite with red spectrum, then combine these two until harvest. Or, buying 400w hps, and using it through the whole grow. I guess the good side with envirolite is it's low operating cost, proper spectrum(hps only red) Rating: 5