terryros |
08-22-2011 10:22 PM |
I know that Jerry Fischer at Orchids Limited thinks the bulbs you bought can get the job done, but that the more expensive MR16 and BR30 bulbs have more output and will do a better job. It takes less illumination than people think to grow acceptably indoors because you have steady illumination throughout the day, particularly if you have appropriate wavelengths of light. The problem with footcandles/lumens is that it isn't necessarily telling you the amount of illumination of the wavelength you want. As pointed out by others in the various chains going about this topic, focusing with a lens also enhances the illumination because you are not losing light radiating out into the room. I know that companies may not tell the truth, but the datasheets published by ALTLED company that makes the MR16 and BR30 LEDs sold by Orchids Limited show that at 30 inches above a growing zone, the MR16 7w 38 degree dispersion natural white bulb will create a cone of illumination that has a diameter of approximately 21 inches at the base with 246 fc (2,648 lux) illumination. Bottom line for me is that after 6 months using only LEDs of these two types I have good growth, spiking and blooming happening with different genera, great reduction in heat production compared to my previously fluorescent filled room, natural looking plants and flowers, and I love having the lights much higher above the plants than I could have the fluorescents. In the end, we have to experiment with what actually works to grow and bloom our plants in an artificial environment. I will never be fortunate enough to have a greenhouse and natural sunlight illumination, so I search for the best combination I can find in my indoor room. I am fortunate enough that I can invest the upfront increased cost of these LEDs to get the longer term benefits. They don't need to be better than fluorescents in terms of growth/blooming for me to be happy because I needed the heat reduction and height over the plants.
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