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Ice Flow water-cooled heat exchanger $285.00 | Advanced Nutrients advanced nutrients.com Ice Flow water-cooled heat exchanger $285.00 | Advanced Nutrients advanced nutrients.com

MH or HPS?
Have both.

Since people have been growing indoors, there has been debate over which type of lamp is the best all-arounder: HPS (high pressure sodium) or MH (metal halide). Savvy growers will use the higher blue spectrum content of MH bulbs for vegetative growth and early flowering and then switch to the red/orange rich spectrum of HPS lamps for mid to late flowering. This means growers have to buy two different lamps and switch them periodically.

MH or HPS?

Have both.

Since people have been growing indoors, there has been debate over which type of lamp is the best all-arounder: HPS (high pressure sodium) or MH (metal halide). Savvy growers will use the higher blue spectrum content of MH bulbs for vegetative growth and early flowering and then switch to the red/orange rich spectrum of HPS lamps for mid to late flowering. This means growers have to buy two different lamps and switch them periodically. In some instances, it means having to buy separate MH and HPS ballasts to run the lamps as well. Unfortunately, there is no opportunity to combine the benefits of both lamps on the same lighting system. Well, that is until very recently. Now available are 1,000W HID (high intensity discharge) lamps that literally combine the two types of lighting into the same lamp, for use on a single ballast system. This means that the spectrum is very rich in all bandwidths for healthier growth in all phases, and eliminates the necessity of switching lamps over mid-crop.

The 1,000W units combine a 600W HPS arc tube and a 400W MH arc tube into one lamp, similar in appearance, size, and shape to a standard HPS lamp. Growers can now deliver 60 percent HPS and 40 percent MH at the same time from the same fixture. Blending lighting spectrums has never been easier, and it can be less expensive than purchasing two different lamps or lighting systems.

Eye Hortilux Super Blue 1,000W dual-arc lamp $260 | Eye Lighting International of North America, Inc. eyehortilux.comEye Hortilux Super Blue 1,000W dual-arc lamp $260 | Eye Lighting International of North America, Inc. eyehortilux.comFinally, Closed-Loop Cooling For HID Lamps


All indoor growers quickly realize that a lot of heat is generated by the high intensity discharge (HID) lamps that provide light to their plants. Until recently, there have been two basic ways used to remove heat from the lamps before it heats up the garden: air cooling and water cooling.

Air-cooled reflectors are most common and are relatively effective. However, growers do not appreciate the labyrinth of ductwork required and the fact that they must discharge the heat outside through vents. Water-cooling the lamps directly with specialized lamp jackets is efficient, although expensive to install on a per-lamp basis.

A new method has emerged, and it’s called closed-loop water/air cooling. In this method, aspects from both traditional air-cooling and water-cooling methods are combined. This eliminates the need for extensive ductwork, venting heat outside, and is economical to install and operate.

Using existing popular 6-inch air-cooled reflectors, a water-cooled heat exchanger is installed in-line with the air-cooled reflectors. Cold water is circulated through the heat exchanger, which is designed specifically to fit with common air-cooled lamp reflectors. As the warmer air is drawn through the reflector units with the existing fan(s) used for air cooling, it is forced through the cooling fins of the water-cooled heat exchanger. This effectively removes most of the heat generated directly by the lamps, creating a situation in which warmer air from the reflectors does not need to be vented outdoors.

You can now just simply recirculate the air in the grow room through the water-/air-cooled reflector setup and back out again; the water-cooled heat exchanger will remove enough of the heat generated by the lamps to make this possible.

 

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Last modified on Thursday, 18 October 2012 16:28

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