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I have made repeated purchases throughout the year without a single problem. No other place matches their prices and service, period!

the universal is multi-position i.e. horizontal or vertical. Looks like the ground that is sticking out. The bulb might be damaged. Can you change out the bulb?

have a thermo swith on a fan to exhaust the hot air from the top of the room with a damper at the lower part of the room.

250W bulb: http://www.growannex.com/bulbs/16188-ultra-sun-250-hps.html $12.95 <- will work with your lumatek. complete 250W system: http://www.growannex.com/lighting-packages/28259-250w-grow-light-package.html $115 used the ultra sun, works great. the reflector is sun system (USA made) great...

look at this: http://www.growannex.com/lighting-packages/28259-250w-grow-light-package.html

that will work. will have to go to homedeopt and buy the plug and wire your self. You will see two hots (red and black or black/black) and a ground.

yeah, this last july, they implemented a minimum advertised price and minimum selling price.

try this one 35W 65 L/min: http://www.growannex.com/air-pumps/18238-commercial-air-3--35-watt--.html or this one 80W 88L/min: http://www.growannex.com/air-pumps/18239-commercial-air-5---80-watt--.html The first one is obviously more efficient. The ebay one (hydrofarm) is 60W at 70L/min

Having used both, I would definitely recommend the phresh filter over the can. First off, the Can filter use dirtier carbon, heavier metal and poor air flow. The CAN 150 flows 1260cfm while the phresh 14"x50" flows 3800cfm! The phresh also comes with a flange. you can purchase a phresh 10"x39"...

from what I see, to get from foot candles to micromols (umols/m2/s) you multiply: HPS: foot candles by 0.13 MH: foot candles by 0.15 from this and calculations of lumens to foot candles, there seems to be a direct relationship between lumens and photons. but from reading I have done, there is...

You have to understand the difference between the bacterias and fungi. GH, including piranha and tarantula are mycorrhizae and tricoderma. Voodoo contains the bacillus bacteria (especially Bacillus subtilis) which has been shown to prevent pythium (root rot). You only need to use it for a 2-3...

For those that can't find the lowes unit, I found an hps unit (with bulb) for $59.95 here: http://www.growannex.com/reflectors/16632-sun-system-hps-150w-reflector.html

Try growannex.com. They always answer all my emails (even at 11pm). They price match and have quick shipping.

A digital ballast is going to be more energy efficient. More of the energy goes into light production than heat production. If you match up the proper bulb with the proper electronic ballast, you should see an improvement over magnetic.

The interference usually comes from having long cables between the ballast and reflector. That cable acts as a high frequency antennae. Keep the cable as short as possible and you'll be fine. the turbo select 1000W galaxy $198 here...

found the tent here also: http://www.growannex.com/grow-rooms/28064-growlab-40-grow-room.html $70.95 they also have the stealth ro 100 reverse osmosis filter http://www.growannex.com/water-filtration/2421-stealth-ro100.html $152

this discount hydroponics store has the lumatek 600W for 64.95. They also have a sale on advanced nutrients

What you want to look out for is the arching of the tube. High frequencies make some bulbs arc. There are a lot of bulbs out there designed for the electronic ballast many HPS. The problem is that when a manufacturer is talking about the arch, they are targeting the commercial warehouse...

600W light package $155.00 at growannex.com

Just bought this 600W package: http://www.growannex.com/package-lighting/28254-600w-grow-light-package.html was $155 for bulb reflector and ballast!