Prompt

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Everything posted by Prompt

  1. Hello Karl, you're confirming what I'm trying to explain and that is that the wavelengths necessary for optimum growth are not only based on 2 colors. In my Italian forum we often talk about lighting and that's what I always say: If Mother Nature has invented the sun with all those wavelengths there is a reason! Staying in LED theme, I wanted to add that the white LED with the same watt are much more efficient than monochromatic LEDs. I also want to point out that the measurement of the peak of the length of a LED is performed at 25 degrees and has a specific input current. As one of the two parameters also varies the peak wavelength moves to the color scale, the displacement can be tens of nanometers to the right or left of the x axis of the scale. Hardly fail to maintain a monochromatic LED with these conditions, costant current and custant degrees. lastly, the first lamps grow, with only white LEDs, are already on sale. for example: http://www.greenhous...ght/grow-lights Prompt
  2. Hello Dicon, it's always a pleasure to exchange views on this topic. I believe that my knowledge of optoelectronics and plant biology are good. As for the white LED's in my opinion are the best and then explain motivation. Therefore, plants absorb the wavelengths that have been classified as PAR (Photosynthetically Active Radiation), the wavelengths PAR have a range of 400 to 700 nanometers. The following graph shows the individual absorbance values​​, and then represents an average of individual absorbance values​​, this average is the best PAR that a plant can receive. the blue and red lamps only cover a spectrum very narrow and are dedicated only to the peaks of chlorophyll of type A, the rest of the PAR is not covered. below the wavelengths of the LEDs used for lamps with LED red and blue Red led 630 nm Blu led 450 nm As you can see the bell is very narrow and covers a mini but part of the PAR, now I show you the white LEDs graph that I used, the line blu is cool white led and the line red is warm white led. Adding the two tones (cool+warm) you have a spectrum much more comprehensive than just red and blue LEDs. Be careful with the white LED's talk about range, while red and blue LED talk about peak. Now, summing up the range of cool white and warm white LEDs have a spectrum similar to the PAR. This means for me a spectrum valid for the proper growth of plants. Certainly does not hold precisely the peaks of chlorophyll type A, but I assure you that this mixture are very efficient Prompt
  3. Prompt

    PAR

  4. Prompt

    Led red

    From the album: PAR

  5. Prompt

    Led Blu

    From the album: PAR

  6. Prompt

    Led white

    From the album: PAR

  7. Prompt

    PAR mono

    From the album: PAR

  8. Prompt

    PAR color

    From the album: PAR

  9. It costs about 200 euro, excluding labor. It 's very professional because I am primarily an electronic technician but I manage well with the DIY. Prompt
  10. Ok, the driver is constant current 2000 ma, one driver powered 5 led, series wiring. Not use cooling fans but large heatsinks, one for each LED. Prompt
  11. yes, the LEDs are all the series xm-l. I did not understand if you ask me the drivers?
  12. I was wrong :), the warm white are of type t2 while the cool white are of t6, I have them bought in china on the site ledrise, the prices are very competitive. I did not know the LEDs xm-l2, this is good news! The red LEDs can be avoided, because the warm white cover pretty well the red peak of chlorophyll A. Prompt
  13. I'm glad that some of you use white LEDs. the LEDs used on my ceiling light are cree xm-l t5 and Q4, the last cree on the market are cree xp-g2, really good in lumen / watt ratio. Prompt
  14. Prompt

    Led album

    all grow led
  15. From the album: Led album

    ceiling led
  16. blue and red are a hoax to spend lots of money to people, plants need to grow well many more colors, blue and red are the basic colors only for chlorophyll type A. The sun radiates light is color white, fluorescent lamps emit white light, the MH lamps emit white light, there is a reason! The white LEDs are much better than other lamps mentioned above, in addition to the blue and red are many other colors that are received by the plants. Some of my highland nepenthes below this led ceiling are become a beautiful red color. My study and my experimentation starts from basics scientific subjects, I have long studied the properties of plants and saw that the emissions of the white LEDs are good for their growth. The latest LED lamps on the market are in fact white light! Prompt
  17. this is a combination of LED warm white and cool white. sorry, for the others members try to put the pictures in the gallery. Prompt
  18. Hello everyone, sorry for my english :) I open this topic to share my experiments with LEDs. I made a long study of white LEDs, I discovered that their light is better than the common fluorescent lamps. I Improvements concern the emission spectrum and light intensity. For now, I made a 100-watt ceiling for large terrariums, is also developement 14 watt ceiling by a for small terrariums.. With the experience I have also created a spreadsheet for fluorescent lights and terrariums, is now in the process of setting up a spreadsheet for the LEDs. The following are my creations, the 100-watt ceiling led, this is a very powerful ceiling, suitable for one square meter terrariums. up view with components and electric wiring down view whith led lens ceiling on one meter test half meter test that is all ! Prompt
  19. Hello, my name is Gianni, and I grow carnivorous for about 5 years. My latest hobby is home-made LED lamp and terrariums new generation. I like to experiment new solutions for energy saving !