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you are better off w/ indoor air. it will have slightly more CO2 in it.

how about a ceramic MH bulb? pricey but look good and made for HPS ballasts as long as its not digital. http://www.growlightexpress.com/pages/ceramic-metal-halide-pv-c0-2.html

passive venting is just a hole at the bottom where air is sucked in. you get a vacuum or negative pressure,when you pull the air out of the cab.as long as the passive hole is larger than the fan, the needed air will be sucked in. your 2 intake fans are not doing much other than adding noise. a...

how about you man up and get your own place? show a little respect.growing behind mommy's back is a shitty thing to do to her. its her house so she can make the rules. an adult would respect her rules or get out.

why run 2 fans to intake? a passive vent will work just as well. you could leave 1 fan powered 24/7 to have some airflow & power 1 or 2 fans either on the same timer as your lights or a thermostat to power them when the temps get over 75.

from 1000 bulbs website, you can find a wiring diagram for your light, it will be in a .pdf called xxx?specsheet. it will be something like this http://www.1000bulbs.com/pdf/S0150-02C-111-specsheet.pdf here is a few links that might help...

I will stand by my statement, telling someone to use a penny for a fuse or just swapping to a bigger breaker is dangerous & could cause a fire & would deserve your response.I have chewed out people for stupid shit like that but in this case,the worst that could happen is a popped circuit breaker...

all lights over 250 watts use the same mogul socket so if you want to use the aircooled hood with a different ballast and bulb, you will be OK as long as the ballast matches the bulb.

bricktown hasn't been here for a while but others have filled in for him. it sounds like you have the 110 stuff down.I would run a dedicated 110,20 amp line for the t5s. for the 220 lines,romex will work fine.12 gauge(12/3) will work for a 20 amp circuit but you will need 10/3 romex(10 gauge 3...

you are correct that it will draw more. UL requires a label on every electric devise showing its current draw. if the tag is gone from the back of the unit, you might be able to find a tag on the compressor. add it to the draw from the fan to get your total.I would guess from the size of it, you...

if you are refering to me, the reason I dont believe in DIY for light fixtures is that in the event of a fire,any lights that dont have a UL sticker or any wiring that is not to local code will get blamed. especially if it is for a grow. once that happens, homeowners insurance wont pay. my buddy...

w/ your temps, it would be a problem but you can burn rubbing alcohol. Many yrs ago I found a formula & at the time,I had a 4x4x7 box in an unheated barn so for winter,heat didn't mater. a little over an oz burned over 12hrs was needed to bring that sized room up to 1200 ppm according to the...

modifying it will void UL sticker on the light & in the event of a fire,your light will get blamed & homeowners insurance may not pay.I am a big fan of DIY but when it comes to lights & electric,follow code. a buddy lost his garage acouple yrs back & had to jump through hoops to get a...

that will be enough light for about the first month but you will want to double that before long. 2 plants to a pot is not a good idea -if you are real lucky,you will get 1 male in each double pot so you can cut back to 1 per pot.if your luck is like mine,you will get 2 females in 1 pot & the...

only if your plants start getting sucked into the fan ;)

if you are venting the tent outside the room that has the gas appliances & dont have an intake into the room,the room will develop negative pressure & can suck the air from the chimney. as long as you have a good passive intake into the room and/or are venting into the room,you should be fine.

but those fixtures are designed to run w/out a duct and fan.they have openings at top and bottom and let the heat create convection to move the air/heat out. it may not hurt to run without a fan but I would at least add a small PC fan & think Bricktop's suggestion would be best.

I also doubt it would hurt but why take the chance?

I would run my lights sealed from the grow - duct outside air into the lights and back outside so the fans could run constantly for them. then I would hook my fan & scrubber to a thermostat so the fans run only when needed to get rid of heat. if you are adding CO2,you wont need to keep replacing...

dont get discouraged! many are willing to listen & helped by your advise. personnaly, I doubt everyone until I verify their advice & you are one of the very few that I no longer verify. Brick top, there is always 1 in every crowd.let me pass you some advice from my father. in that spirit...