LED Grow Lights With Solar Panels More Effective Than The Sun?
cnc85
14 years ago
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wordwiz
14 years agotaz6122
14 years agoRelated Discussions
Anyone growing under Led lights
Comments (1)Thumper, I find your suggestion kind of odd...requiring begonia to be started under artificial light...IN FLORIDA. That's not the sort of place one thinks one has sun problems. This year I started my begonia late--by the Ides of March...and already, in an east facing window they are up more than 4"--much better than last year's earlier start. Along with my pels, they are doing wonderfully this year. I know its just a query about the L.E.D. light but ---why do you ask?...See Moreled grow lights are amazing!!!
Comments (19)2 32W florescent tubes draw about 1/2 amp (500ma) at 120V The watts is the current draw not the light output. If you say the leds draw 76w which is 630ma at 120v You also need a power supply, depending on how you hook them up. Not counting the driver loss. 450 red leds at 8000mcd is 3.6million mcd or 770 lumens at 30 degrees the blue is 443 lumens at 30 degrees. Total = 1213 lumens at 30 degrees. The 2 T8 4ft bulbs produce 2800 lumens I would assume across the 4ft. You would need to measure the lumens right under the middle of the Florescent bulb to know the lumens at 30 degrees. Unless my math is off I see the florescent being more efficient and cheaper. I found red 8000mcd leds at $0.59 which is $265 just for the red ones. Perhaps you can find them much cheaper but even at $0.1 that's still $45 just for the red. On the other hand you can buy warm or cool white 50W Light output or 3000 lumins for $18 with driver and free shipping off Ebay, but you also need a heat sink, they get hot. There rated at 140 degree but the output drops off rapidly at 5" to either side of center. I used online calculators for the figures. A shop florescent fixture and 2 T8 bulbs is less than $15 Please correct me if I'm wrong....See MoreLooking for a good LED grow light
Comments (44)one at a time, steve, I'd like to see you try 16 flats of flowers doing it with your junkyard method. You would need 60 of them and they still wouldn't produce as good. I find it comical that you would even suggest that. Pip, i'm not listening to the hype, don't grow pot so I have a clear head on this, what I have found FROM REAL EXPERIENCE WITH THEM is that the lights actually kick ass and works far better then the T5HO lights I used in previuos years (I'll sell them to you cheap if you want them). Most of the grow reports are for older technologies going back years, look at the dates, get with the times. Newer review have the P300 light listed with raving reviews and among the top of the breed. I know you're having fun, but please stop spreading wrong info,( or uninformed info as you have never even heard of these until now) , there could be people that would want to use a better (but higher priced) light. each to his own....See MorePost your LED light setup, veg and effective coverage!
Comments (39)These are three DIY LED spotlights with different lens and reflector systems: http://www.general-cathexis.com/images/LedSpotLights.jpg Left to right: 1. Eight "3W" 660nm LEDs with 20mm reflectors. http://www.general-cathexis.com/images/LED20mmReflectorAndLens.jpg Spot projected 100 inches on ceiling with tiles 4.375 inches apart: http://www.general-cathexis.com/images/LED20mmReflectorAndLensSpot.jpg I calculate the beam angle to be approximately degrees 2. "10W" "full spectrum" LED with 90mm reflector a. without lens; http://www.general-cathexis.com/images/LED90mmReflector.jpg Spot projected 100 inches on ceiling with tiles 4.375 inches apart: http://www.general-cathexis.com/images/LED90mmReflectorSpot.jpg I calculate the beam angle to be approximately 35 degrees b. with Fresnel lens: http://www.general-cathexis.com/images/LED90mmReflectorAndLens.jpg Spot projected 100 inches on ceiling with tiles 4.375 inches apart: http://www.general-cathexis.com/images/LED90mmReflectorAndLensSpot.jpg This is the most uniform of the spots. I calculate the beam angle to be approximately 15 degrees. 3. "10W" "full spectrum" LED with 44mm reflector and lens: http://www.general-cathexis.com/images/LED44mmReflectorAndLens.jpg Spot projected 100 inches on ceiling with tiles 4.375 inches apart: http://www.general-cathexis.com/images/LED44mmReflectorAndLensSpot.jpg I calculate the beam angle to be approximately 27 degrees....See Morestruwwelpeter
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9 years agoEco Gardens
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9 years ago
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