i dunno its a small wooden cab from target i spent like 25$ on. im still waiting on my 3000rpm 130cfm fan to get here. im gonna use the 130cfm pc fan to exhaust and the 87cfm i have as exhaust now will be used to circulate air around the bulb.are you using a closetmaid cab.? i built one with a 150w/hps and a s&p fan and it run 78 all day. any pics?
what do you think would yield better, 150 watt hps or 250 watts of cfl ( 6x 42 watts actual)
BC, that 150 is good for about 3 square feet. Light is distributed better if you'll orient the element parallel with the short dimension of the footprint. If your footprint is square, orientation isn't an issue. You'll get about a foot of penetration and you'll need additional headroom for pots, hydro res, etc. If you plan to LST or SCROG, you won't need but a couple or three feet of headroom. Some growers have 4 to 5 feet and have the option to let their girls get leggy. Either way, you're going to get the same amount of penetration and you might get a little less with substantial canopy.
A 150 gives good light penetration up to 10-12" (24.5-30.5cm) from the bulb. So, no matter how you plan to orient your bulb, you should get good coverage everywhere in the cab you described. If you plan to make a reflector yourself, try to make it fit the dimentions of your cab as closely as possible. If you plan to permanently mount your bulb close to the top of your cab, painting the inside of your cab flat white will work nearly as well, and will be cheaper and less time consuming.I'm just getting together some equipment for a 150w grow, the floor space is 40x40cm which is roughly 1.3foot. I'm wanting to make an octagonal reflector for the space but I'm unsure of the dimentions to be used, does anybody have an idea what I should be aiming for?
A 150 gives good light penetration up to 10-12" (24.5-30.5cm) from the bulb. So, no matter how you plan to orient your bulb, you should get good coverage everywhere in the cab you described. If you plan to make a reflector yourself, try to make it fit the dimentions of your cab as closely as possible. If you plan to permanently mount your bulb close to the top of your cab, painting the inside of your cab flat white will work nearly as well, and will be cheaper and less time consuming.
You're cab is a bit on the small side. I'd focus on good ventilation before I put my energy into a DIY reflector. But, that's just my 2 cents.
Good luck, and keep us posted on your progress. Remember, tell NO ONE what you're doing! Stay safe n