i would go with the hps if i were you. look at the 150 watt hps thread on here, i believe the OP used a 150 hps in ONE 25 gallon rubbermaid- with only computer fans as an outtake. in my opinion, it should work as long as you are smart about it. meaning dont let anything extremely hot (which the light and socket will be) touch rubber, or your plant for that matter. also make sure you have a fan or two blowing directly on the hps, for obvious reasons. and good ventilation in general. if you are planning two stacked on one another id say a 6 inch duct booster will be enough, provided you still have an intake and circulation on the inside.i think im just gonna go with 2 250 watt cfls hps's get too hot for rubbermaids its not worth the risk
huh i didnt know those cfls put that much heat out, but yeah ill have to make a decision here soon i'm thinkin hps though with a scrogi would go with the hps if i were you. look at the 150 watt hps thread on here, i believe the OP used a 150 hps in ONE 25 gallon rubbermaid- with only computer fans as an outtake. in my opinion, it should work as long as you are smart about it. meaning dont let anything extremely hot (which the light and socket will be) touch rubber, or your plant for that matter. also make sure you have a fan or two blowing directly on the hps, for obvious reasons. and good ventilation in general. if you are planning two stacked on one another id say a 6 inch duct booster will be enough, provided you still have an intake and circulation on the inside.
are you really thinking of getting 500 watts of cfl's instead of ONE 150 hps? im pretty damn sure those cfls will put out more heat.
if you go with the hps and havent gotten the light, id buy this one. well i did buy it already. its only 30 dollars so probably cheaper than the cfl's and comes with everything but the power cord, but they sell that for a couple bucks. it comes as an outdoor lamp but its easy to take apart and you end up with a nice reflector. theres a picture of it in the one thread i posted as well if your curious. good luck with the grow.huh i didnt know those cfls put that much heat out, but yeah ill have to make a decision here soon i'm thinkin hps though with a scrog