Connect with us

LED Lighting question

Discussion in 'LEDs and Optoelectronics' started by kwdelre, Aug 11, 2009.

Scroll to continue with content
  1. kwdelre

    kwdelre

    5
    0
    Aug 5, 2009
    I am trying to rig up a LED lighting system for my Saltwater Reef Tank. I need to achieve about 300 lumens at a distance of 2 feet. I am having trouble doing this.

    Here is my question. I have 12 LEDs lighting up and producing approx. 300 lumens at a distance of 6 inches. What can I do to increase this distance? Would adding more lights increase my lumens distance? Thanks everyone.
     
  2. Resqueline

    Resqueline

    2,848
    1
    Jul 31, 2009
    Lumens is a distance-free unit. It's the total output from the light source (summed in all directions).
    Candela, or Lux are the terms used for illumination of a surface (at a distance from the light source).
    To answer your first question: use reflectors or optics.
    To answer your second question: yes.
     
  3. kwdelre

    kwdelre

    5
    0
    Aug 5, 2009
    Thanks for the reply.....

    I seemed to have misunderstood my requirements. I am trying to acheive a high PAR reading from these LEDs. Since PAR decreases over distance, would adding more and more lights increase this PAR reading?
     
  4. Resqueline

    Resqueline

    2,848
    1
    Jul 31, 2009
    As long as the LED's have photosynthetic active wavelengths at all then I assume that doubling the number of LED's will double the PAR reading - as well as the lux reading of course.
     
  5. mrdoodad

    mrdoodad

    3
    0
    Aug 24, 2009
    LED Selection Solution

    Preface note: If you are trying to duplicate sunlight, you want to keep wavelength in mind when selecting LEDs. Use a couple of 10mm, 5,000 MCD? Giant Bright White LEDs from Electronic Goldmine (goldmine-elec dot com), pt# G14040, maybe use with diffuser filters since they are blinding to look at (be careful!, these are brighter than a halogen source), and will turn night into day. I'm using some of these to light up business signs (only two required!!). These run on 3.4 vdc @100 mA each typically.

    DD
     
  6. amdNRA

    amdNRA

    50
    0
    Sep 3, 2009
    Check this out and see if it would work. I just ordered this light myself (for a bike); but it seems like it can work in your application. It's got pretty good light output :D. More than likely, you would want to use a power supply at home.Hope that helps, Gil.
     
  7. amdNRA

    amdNRA

    50
    0
    Sep 3, 2009
    Sorry; the copy/paste didn't take.
    Here it is: doubleudoubleudoubleu(dot)dealextreme(dot)com/details.dx/sku.25149
     
  8. amdNRA

    amdNRA

    50
    0
    Sep 3, 2009
    Had to spell out the website...Wouldn't take it otherwise...oh well
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-