Feb 16, 2006 · As far as I know, HPS (high pressure sodium) is the most efficient lighting system. With grasses, etiolation doesn't seem to be as much of a problem as it would with e.g. tomatoes.

Sep 4, 2015 · The Excelvan PG01 LED grow light will emit light in the red and blue wavelengths at 620-630nm and 460 to 470nm, these wavelengths correspond to chlorophyll's absorption peaks and will …

Dec 28, 2011 · From seeing commercial growers, I usually see greenhouses have metal halides, hps, or T5 flourescent bulb setups so having the right kind of light is very important. For example, a 6400k cfl …

Jan 6, 2007 · A 600W HPS - the proverbial design "sweet spot" - coupled with a digital ballast - less than $250 USD, with a power factor of 0.99 or so - would be far less efficient due to heat generated by the …

Dec 20, 2006 · In this class are HPS, or high pressure sodiums, and metal halides. Besides needing a fixture, you will need a reflector, and a ballast to start off. The cheapest of these are the standard …

Jan 5, 2007 · MH has hazards, HPS is better, but it has a very high operation temperature, as is the MH as well. also your power costs are VERY high. You can get a PFC easily buy buying a motor run …

Dec 20, 2006 · Unlike HPS, you can bring the light practically right on top of the leaves without experiencing leaf burn. Its amazing how if its done right, you can have cuttings rooting in the middle …

Jan 22, 2007 · The MH/HPS bulbs also can and do explode sometimes during operation sending very hot glass not to mention the vapourized mercuric oxide (s) into the surrounding air. Yes, if you are …

May 22, 2010 · Anyone have Sasa gracillima shoots growing to 6 1/2 feet? I was only expecting 2 1/2 feet. needmore Posts: 5008 Joined: Location info: 0 Bamboo Society Membership: ABS - America …

Bambooweb Bamboo Photos - - page 27of321 New shoots fully open from Spring. Has been in the ground now 2 years. Very little spread. Maybe 8 inches from original spot. Likes to send up shoots a …