tj Wise
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I was reading stuff on the internets... so many opinions... a guy was saying we should use just one type of bulb that emits both the red and the blue spectrums. Has anyone heard of this? Would it save money or be more efficient?
try a dual arc.I was reading stuff on the internets... so many opinions... a guy was saying we should use just one type of bulb that emits both the red and the blue spectrums. Has anyone heard of this? Would it save money or be more efficient?
The sun is broad spectrum. Growing plants indoors under broad spectrums mimics natural conditions.
Sedate: You are laboring under old science. There is ample data to support the need for green light as a necessary component for optimum photomorphogenesis. As broad spectrum goes the plants finish differently than under narrow chromatic approaches such as straight HPS in flower. CBD:THC ratios under HPS that might range 8:1 for example I've seen come in closer to 1:1 under broad spectrum. The plant will defend itself from the presence of UV-B by creating more trichomes and the trichomes they produce will be hard cut geometry.
LED grow light manufacturers are beginning to recognize the importance of green light and they are adding more white into their designs. Which as anyone who has ever grown under a magenta colored LED panel will tell you is a welcome improvement in not only plant response but to those of us who tend to our plants in unnaturally lit conditions.
http://msue.anr.msu.edu/news/green_light_is_it_important_for_plant_growth
Sedate: You are laboring under old science.
chazbolin said:There is ample data to support the need for green light as a necessary component for optimum photomorphogenesis.
From chazbolin's link: said:Therefore, blue light suppressed extension growth more than green light in an enclosed environment
From chazbolin's link: said:. Twenty-five percent green light could substitute for the same percentage of blue light without affecting fresh weight. However, the electrical efficiency of the green LEDs was much lower than that of blue LEDs.
chazbolin said:As broad spectrum goes the plants finish differently than under narrow chromatic approaches such as straight HPS in flower. CBD:THC ratios under HPS that might range 8:1 for example I've seen come in closer to 1:1 under broad spectrum. The plant will defend itself from the presence of UV-B by creating more trichomes and the trichomes they produce will be hard cut geometry.
In addition to covering themselves in trichomes as a "sun screen", don't trichomes also require UV to produce THC within the glandular head?
If so, would those 10k MH bulbs accelerate this?
There is an 860W Phillips CMH that runs off of a 1000W magnetic MH ballast. Vertical only though so you need high ceilings!View attachment 446294 I been growing with cmhs for 12 years. Much better expression and more usable light to the plant with cmh. Wish they came in a 1k. I Have this triple 400 hood i love to use better than my 1k any day !Ive tried even putting a hps with a cmh and went back to cmh. Seams like dull light hps has to me. I cant handle it .lol. I started with hps. Since they dont make this 400 i use any longer i think i will try the 315 mentioned next time maybe. Can i modify my magnetic 400 to run with them is my question? lol
But Philips 315w is using UV-block quartz tube, it is for commercial lighting to protect human eyes, they never thought it will be used as grow light , we need UVA for plants
So the reason i prefer the dual arc is that you don't have one physical piece that is trying to do both tasks. throwing out reds,yellows blues and some greens. the dual arc contains a metal halide "filament" AND the quartz "filament". this allows them to do their specific jobs with in one envelope. IMHO this is what makes them more specialized than the newer style full spectrum lamps or the "blue" labels that are out there. if you can, get a dual arc and an HPS as you should have a back up any ways in case you blow a lamp, then try both. also most dual arcs spec out 400w worth of MH and 600w worth of HPS which is an awesome balance leaning towards the HPS. look up 247garden for a good price on an awesome lamp.here is some mexican weed from underneath a dual arc.I was reading stuff on the internets... so many opinions... a guy was saying we should use just one type of bulb that emits both the red and the blue spectrums. Has anyone heard of this? Would it save money or be more efficient?