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instead of mylar, just paint everything flat white. mylar is a pain to apply properly and a bitch to keep clean. for that size area, a 250 watt HPS would work better than CFLs and less headache to setup- you wire 1 light instead of 10-20 25 watt CFls or 2-3 100 watt CFLs. up front cost may be a...

a sub panel isn't needed but if you want to expand further down the road,it would make life easier then for not much money. 2 20 amp circuits added to what you already have should be enough.(you never mentioned what size AC) but a 220 30 amp breaker and 1 run of 10/3 romex will cost about as...

buy a 60 pound bong! switch hands every time you hit it.

only if the attic does not have proper ventalation and you are dumping a large amount of moist air into the attic. for a tent in a closet,you will be fine. after running it for a week or 2, pop up in the attic & look for signs of excessive moisture.

unless you seal your room, you are wasting your time. use a cool tube to vent the light, move the ballast out of the room & get an AC unit to cool the room or at least hook your fan to a thermostat so it won't run often & waste CO2. remember plants like lower 80s w/ enough CO2 so you shouldn't...

how about leaving the door to the room open or venting into a room w/ a window?

start w/ what you have on a smaller scale.use the 2 400w lights on 1/2 the table(6x4) master your hydro setup 1st, then consider expanding,adding CO2,more lights, ect.

If canna is all organic,its not needed but it wouldn't hurt to flush 7-12 days b4 harvest & just water after that. chemical ferts dont "need" a flush either but it will improve taste.

unless you are in the desert,I will disagree w/ both of the above IF, you run CO2,the hoods are vented in & out of the room w/ decent fans & you move the ballasts to outside of the room. w/ CO2, you can run the room in the low 80s so unless your temps average in the upper 90s or better for most...

if you are going to need AC to cool with, you should consider a sealed room w/ CO2 otherwise your AC will run almost nonstop as you will be sucking all the cool air out. also your location makes a difference. If your in the Arizona desert, An AC is a must but if your in the northern canadian...

check this out https://www.rollitup.org/grow-room-design-setup/385722-about-pc-fans.html

PC fans don't have the power to push through a carbon filter. you will either end up w/ a wimpy filter that won't kill the stink or the fans will not move enough cfms to cool the room. sorry. consider ona gel, an ion filter or bigger fans.

if you can wire an outlet,adding a breaker or 2 should not be to hard. look at your panel box,are there any knockouts to add more breakers? (a picture would help). if not they make a breaker that gives you 2 15 or 20 amp breakers in the same space as a normal single breaker. something like this...

besides a 400 watt ballast,what the fuck are you running in that room that needs this? what is the question? don't you have any outlets? not trying to be a dick,just dont understand what you need answers for.

you can test live but it would be easier to set the meter to an ohms scale and check continuity from the wire to the plug. the light fixture has blk &white so it sounds like its for N.America(110 volts) but the cord is brown,blue & green so it sounds European(220v) cant help much w/out knowing...

I have rebuilt several dozen magnetic ballasts & never saw a timer or cutoff relay in 1. the ballast will keep re-striking the bulb till it cools enough to light. like Alpha said,once or twice wont matter but repeatedly will hurt the bulb.

My buddy gave me 1 several yrs ago & warned me if it is in the room w/ the plants, they wont have any smell so I have always used it in the room I vent into. worked great till it died recently. plan to buy another soon.

.looks like it was a mistake. now priced at $439

property is fairly cheap in upstate NY compared to some areas but new york taxes will kill ya! -my tax bill on a $100k house is almost equal to the 30 yr morgage! then you have sales tax,income tax,tax on car registration,tax on car insurance,gas tax,utilities taxes,sewage taxes.... no tax on...

damm! I run a 400 hps in a hood w/ 2 pc fans,1 @ the start of duct pushing air & 1 @ the end sucking air out -straight shot,4 in duct, no bends or filter. & the hood is warm but not hot to the touch. the air is drawn from another room in the basement so its cool going in.