FredG Posted November 3, 2012 Report Share Posted November 3, 2012 (edited) As I posted here by accident I may as well make use. The lumens / w figures are a surprise. From the figures I've seen from the manufacturers , corncob LED lights give out about the same as a fluorescent tube of the same wattage. Your differences must be due to the focused light of a flat array. It's all very encouraging Edited November 3, 2012 by FredG Quote Link to comment Share on other sites More sharing options...
manders Posted November 3, 2012 Report Share Posted November 3, 2012 I also think think it has to be largely due to the focused light. There are other losses though with both flourescent and HPS, an 18W flourescent bulb is losing 5 watts in the ballast for example so actually consumes 23W, same with HPS. Even with red/blue UFO's the lux seemed high but its not easy to compare flourescents with red/blue light so i didnt think about it much. Quote Link to comment Share on other sites More sharing options...
The body snatcher pod Posted November 4, 2012 Report Share Posted November 4, 2012 I grow some plants under high power white-ble-red LEDs and they are doing fantastic! I use little red and lots of blue, so I can encourage vegetative growth. Quote Link to comment Share on other sites More sharing options...
Nepaholic Posted November 25, 2012 Report Share Posted November 25, 2012 Hi i took some pics of 2 heliamphora today. they grow under LED since february and seem to love it... Quote Link to comment Share on other sites More sharing options...
The body snatcher pod Posted December 10, 2012 Report Share Posted December 10, 2012 Hi! Here you have some (bad) pics of muy terrarium lighted only with LEDs http://www.cpukforum.com/forum/index.php?showtopic=48091 Quote Link to comment Share on other sites More sharing options...
pmatil Posted December 21, 2012 Report Share Posted December 21, 2012 (edited) mobile, are you using "royal blue" as your blue led in your setup? And for the red amber?. I've been planning to try a mix of royal blue and amber or "red orange". Not sure at the moment which one is better suited for plants. I'll maybe use these leds: (pdf link) http://www.farnell.com/datasheets/1498098.pdf. These are 3 W power leds by Avago. I'm sure there are other types but I don't think there are much bigger single leds for royal blue or red/amber. Edited December 22, 2012 by mobile Quote Link to comment Share on other sites More sharing options...
mobile Posted December 21, 2012 Report Share Posted December 21, 2012 Mine are 660nm red, 615nm orange, 455nm blue and 3700K warm white, in a ratio of 3:1:1:1. Quote Link to comment Share on other sites More sharing options...
pmatil Posted December 22, 2012 Report Share Posted December 22, 2012 (edited) Yeah, for the Avago leds royal blue would be 450-455 nm, deep red 640-660 nm and red-orange 612-615 nm. I think those do just fine. mobile, what type/model of leds do you use? Edited December 22, 2012 by pmatil Quote Link to comment Share on other sites More sharing options...
mobile Posted December 22, 2012 Report Share Posted December 22, 2012 Av8tor1, over on Terraforums, had a custom 3 chip Tristar made up: http://www.luxeonsta...r-03-000129.htm. They can make custom assemblies, for which you pay a custom mounting fee, but then they are added to the pre-defined list for repeat orders. mobile, what type/model of leds do you use? Mine was a pre-assembled lamp, so I don't know the type of LEDs. Quote Link to comment Share on other sites More sharing options...
Milos Sula Posted August 23, 2013 Report Share Posted August 23, 2013 Hi, please does anyone have experience with Wistuba LED strips for growing seedlings or in vitro cultures ? Quote Link to comment Share on other sites More sharing options...
Maciej Stelmach Posted August 26, 2013 Report Share Posted August 26, 2013 Hello, I'm also looking for someone with an experience on led strips. From what I suspect those Wistuba's leds are just typical 5050 led strips and the only difference that they're customised so there's mix of blue and red on it. Would 2 strips where one is blue and second one red make things work as well as with Wistuba's leds? And to go one step further - what wattage of led strip is needed to cover for example an area of 100x40cm where the distance between light source and plants is about 30cm? I'm talking about an adult plants, not production which probably needs not as much light. Any answers would be greatly appreciated! Quote Link to comment Share on other sites More sharing options...
Gringo Posted August 26, 2013 Report Share Posted August 26, 2013 My panel has a total power of 150W, and covers an area of 100x40 cm ;) Works fine. Quote Link to comment Share on other sites More sharing options...
Maciej Stelmach Posted August 26, 2013 Report Share Posted August 26, 2013 Thanks Gringo, but you're not very specific when it comes to led colors you use and type of strips. I assume you also have white leds which are of no interest for me therefore both blue and red would probably use around 100W in your case. Basing on Wistuba's words where he states that 1m of led strip is an equivalent of a fluorescent bulb of same lenght (which eats twice as much power) i'd say that 200W bulb is far more than enough for such an area, maybe even unnecessary. As I'm rookie when it comes to artificial lighting I might be terribly wrong on that. Quote Link to comment Share on other sites More sharing options...
mobile Posted August 26, 2013 Report Share Posted August 26, 2013 I don't know if these are similar to Wistuba's, but they specify the wavelength: http://www.123trading.de/LED-Anwendungen/Pflanzenlampen/5m-LED-Strips-Lichtband-Pflanzenwuchs-Licht-SMD-5050-70W::3297.html?XTCsid=d99ad2571d673833317543a2a0cf4d64 They were originally mentioned in this post: http://www.cpukforum.com/forum/index.php?showtopic=49296&st=20#entry341407 Quote Link to comment Share on other sites More sharing options...
Maciej Stelmach Posted August 26, 2013 Report Share Posted August 26, 2013 Big thanks mobile, btw your H. minor is a stunner! Beautiful colors. Could you please give me a hint on a wattage of your leds and area they cover? I'm using 5050 strips which consume 15W per meter. From what you say in the post mentioned above (and from my own research) there should be at least 3 times as much red than blue leds which I'm aware of. Knowing (basing on information found on the internet) that red encourages flowering and blue stimulates growth it still makes me wonder why red is so important and not blue instead. I guess there are no simple answers to that. Quote Link to comment Share on other sites More sharing options...
mobile Posted August 27, 2013 Report Share Posted August 27, 2013 Big thanks mobile, btw your H. minor is a stunner! Beautiful colors. Could you please give me a hint on a wattage of your leds and area they cover? My LED lamp is 15W (15 x 1W LED). The area I cover with it is that one H. minor, though I'm sure it is capable of covering more. Quote Link to comment Share on other sites More sharing options...
Maciej Stelmach Posted August 27, 2013 Report Share Posted August 27, 2013 I'm guessing the area your lamp covers would be at around 30x30cm or 40x40cm. Triple the wattage and it should be fine for my 100x40cm terrarium, of course if the light spectrum is right. Thank you mobile! Quote Link to comment Share on other sites More sharing options...
pmatil Posted August 28, 2013 Report Share Posted August 28, 2013 (edited) I've just completed a test setup with ebay leds. I got 5 pcs 5 W red 660 nm and 5 pcs 5 W royal blue leds. Here I have 4 reds and 2 blues and one white (came with a DX spotlight). The leds are driven with 3 drivers (white currently not connected): 2 red leds have one driver (in series), 2 blue and again 2 red (in series). The heatsink is for a stock AMD cpu. The red leds are on the corners, 2 blues top and bottom middle and white (3-led) on the center. With default settings for the drivers (DX constant current ones) for a 12 V input the current is 1,3 A so about 16 W input power for all the leds except white. The heatsink gets quite warm after a while so I'm probably not going to drive them at full power (no fan). Maybe about 10 W for all the leds for now as this is for a cephalotus pot. The led drivers have a dimming pin so I could easily add a PWM dimming option for each led or in pairs depending on the connection. I hope the picture works... https://dl-web.dropb.../Led-light1.jpg Edited August 28, 2013 by pmatil Quote Link to comment Share on other sites More sharing options...
Maciej Stelmach Posted September 3, 2013 Report Share Posted September 3, 2013 It doesn't work, pmatil Quote Link to comment Share on other sites More sharing options...
pmatil Posted September 4, 2013 Report Share Posted September 4, 2013 Hmmh, how about this link: https://www.dropbox.com/sc/gs1301vssk0hecq/oEPssO_mQU Quote Link to comment Share on other sites More sharing options...
Maciej Stelmach Posted September 4, 2013 Report Share Posted September 4, 2013 Yes, it works now. Interesting setup you have there :) Quote Link to comment Share on other sites More sharing options...
Prompt Posted September 8, 2013 Report Share Posted September 8, 2013 (edited) I use only white LEDs, warm white cool white, ratio 1:1. Under my ceiling were born 100% Roridula gorgonias, flowering sundew chrysolepis, I grow about 20 nepenthes highland / intermediate, drosera ascendens a diameter of 8 cm, all in good health. In the next periodic AIPC there will be an article written by me on testing the white LEDs on carnivorous plants. The eye wants its part and the plants they want their lights ! Prompt Edited September 8, 2013 by Prompt Quote Link to comment Share on other sites More sharing options...
Maciej Stelmach Posted September 8, 2013 Report Share Posted September 8, 2013 Hello Prompt, That's very interesting that you're one of very few (I suppose) people using white leds for their plants. Everyone are recommending a mix of blue/reds while you've abandoned those light spectrums completely. I wonder what type of leds are you using (are those strips? 5050 etc.), what area do they cover and what's the distance between light and leaves. But the most important thing is if your plants are well colored - especially D. chrysolepis? Quote Link to comment Share on other sites More sharing options...
mobile Posted September 8, 2013 Report Share Posted September 8, 2013 There's no reason why white LEDs would not work, in the same was as white fluorescent lights do - in fact they share similar characteristics in that they both use phosphors to produce white light. There are of course efficiency losses when using any white light for plants, as plants cannot use the whole spectrum, so there is some wasted energy. White LEDs are however much easier to focus the light onto the subject than fluorescents, so there is an efficiency gain there. Plants looks at lot more pleasing to the human eye under white light than they do under red/blue, so that is something to take into consideration. Quote Link to comment Share on other sites More sharing options...
Prompt Posted September 9, 2013 Report Share Posted September 9, 2013 (edited) 5050 LEDs are good for terrariums under to 50 cm high, while the 5630 can use them under to 60 cm, height exceeded this must orient on power led, if the terrarium is higher than 80-90 cm must be added to additional optical for power LEDs . I just wanted to point out that the phosphor white LEDs have applied to cover more shade than the classic fluorescent lamp 6500k - 4200k etc.., However are very close to fluorescent phytostimulants, especially warm-white LEDs. you can find my accomplishments in this section of the forum, both with power LED and also with SMD 5050. Lately I have also created a ceiling light with led cob and one with rigid led streep 5050. As I have time I'll show you. I put later, the photos, D. chrysolepis. Prompt Edited September 9, 2013 by Prompt Quote Link to comment Share on other sites More sharing options...
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