I use mine in a closet sized grow tent & it really works nicely. Not a buzz to be heard, ultra quiet operation & my bulb seems brighter than when it was in it's old ballast. Pretty good light vs heat ratio as well.Click Here to see more reviews about: 400W 120 Volt HPS Cool Tube Digital Grow Light System
Product Description:
The Cool Tube Digital system comes complete with a 19 inch Cool Tube reflector, Lumatek digital ballast and a standard HPS bulb. The Cool Tube reflector measures 6 inches in diameter X 19 inches long. Cool Tubes offer the most compact and effective way to get bright light over, or in, your growing area. Due to their streamlined design, cooling airflow can move unimpeded, keeping growing area temperatures lower and allowing you to position your lamp very close to your plants. These lamps are also excellent hanging vertically down into the plant canopy or for enclosed growth chambers. This reflector includes a 14 inch socket cord and 15 foot extension cord that attaches the socket to the ballast.Lumatek offers: 20-30% more lumens than magnetic ballasts, Lumatek ballasts are 8-15% brighter than other brands on the market, completely silent so you can leave the humming and buzzing behind, best warranty in the industry 3 years and full warranty plus 2 years prorated, small compact design of under 10 pounds, completely sealed from the inside and water resistant, fast start up so it reaches full brightness in under a minute, no fans - resin sealed industrial case to ensure reliability, cut-off circuitry automatically shuts off in case of short, reliable, every ballast is factory tested for 12 hours, RF shielded output cord, and microprocessor controlled to ensure proper performance with every bulb.The standard bulb comes with a 1 year warranty. This system includes the all-system cord/socket set.
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