LED flood lights

Discussion in 'Lighting' started by rakabos, 5 Sep 2014.

  1. rakabos

    rakabos

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    So we all know how expensive LED's can be. I have been toying with the idea of trying out the LED flood lights.

    I bought a 20W 6000k (R120) and a 10W RGB (R220). What are your guys thoughts on these on a reef tank? I know the 6000k is a bit low and may promote algae growth, but overall it should be ok right?

    The 10W RGB was on the white setting, and looks like 10000k or so. The blue setting was very nice and i'd say royal blue to those who know.

    Below is a few pics of what they look like over water and also a pic of how I would typically use them on my tank.


    [​IMG]

    [​IMG]

    [​IMG]
     
    Last edited: 5 Sep 2014
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  3. Jason

    Jason

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    I knew a guy using them on hes tank, hes tank was quite shallow, think 450h and was looking good, corals was alive not sure if they where thriving as he only had the lights on for about a month or two...

    They only thing that might be an issue is the par and pur rating, bat that im no expert on, guess its trial and error...
     
    Last edited: 5 Sep 2014
  4. Lord_Blackadder

    Lord_Blackadder

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    Got a 10W 6500k over a small tank with mangroves and they're thriving. 7 plants around 25cm high and getting side branches. So I can confirm that they work great for mangroves and macroalgae (at least).
     
  5. Aurora

    Aurora

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    Thought about doing the same thing!

    Will be following your progress with interest.
     
  6. rakabos

    rakabos Thread Starter

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    Yeah these 6000k ones work well for planted tanks from what ive read, question is will easy-to keep corals be ok and will i not be overgrown with algae...
     
  7. rakabos

    rakabos Thread Starter

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    Ive always wanted to be a guinea pig :tt2:
     
  8. rakabos

    rakabos Thread Starter

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    One problem i cant get around is the RGB LED. It reverts back to RGB flashing when powered up. I would have liked it to stay on the blue setting 100% of the time on timers. I cant seem to find blue only flood lights except on ebay and the post office is striking.
     
  9. RiaanP

    RiaanP Moderator

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    I use 10W white on my cheato and caulerpa.

    I tried the same units on Halimedia and some red macro algae, and that did not work. Red went greenish spots at places, and Halimedia started going white. Maybe if I retry that under a 20W instead of 10, then it could be better. But that did not work out on the 10W. Moved the plants back into the shallow frag tank under T5 lights. Will re-test with 20W once it recovered.
     
  10. Vetrix

    Vetrix

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    I'd rather have more blue units than white, especially if the white is 6000K. If you aiming for 14000k, then you will have to replace some of those whites for blue.
     
  11. rakabos

    rakabos Thread Starter

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    Or change the 10w blue for 20w in the diagram?
     
  12. rhox

    rhox

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    Tagging along ☺
     
  13. rakabos

    rakabos Thread Starter

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    All these damned tailcoat riders :tt2:
     
  14. Vetrix

    Vetrix

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    Swap the whites and blues, so you'll have 6 blue and 4 white. Use 20W's if you can.
     
  15. rakabos

    rakabos Thread Starter

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    Thats gonna be way too blue i reckon. I will order a single 20w blue and post here when i receive it. They go for around R220 or so on ebay
     
  16. Vetrix

    Vetrix

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    Check this out, LEDs For The Reef Tank - Reef LED Lights.

    You'll have a very low K rating with more whites than blue.
     
  17. EFJ

    EFJ MASA Contributor

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    Guys, led's are naturally blue. As far as LED flood lights go generally they are not ment for marine tanks but I have seen lately the norm of having 10000k+ lighting is being challenged. On various sights I see guys using less kelvin to run tanks but I must say the bio load is much less (more fish higher the load more algea, more corals less fish less bio load). Lighting, flow and bio load all work together.
     
  18. Vetrix

    Vetrix

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    You can grow corals under 6000k, water will look like pee and algae will love it. If you plan on keeping no fish then maybe you can keep the algae under control. But really, who would want to do that?
     
  19. rakabos

    rakabos Thread Starter

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    So after a bit more research ive decided to swop out the 6000k 20w leds for some of these from eBay.

    20W High Power LED Chip Cold White 10000K 15000K 2200LM LED

    [​IMG]

    Also gonna put these in

    10W Hybrid Aquamarine Royal Blue LED chip *450nm* & Aqua Cool White 15000K

    [​IMG]

    I have opened the flood lights and its quite straightforward to swop the LED's out for the color you want. Will post some pics when i receive these and retrofit them. Think its gonna look great!
     
  20. Duanew

    Duanew

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    Following with interest
     
  21. Ricky W

    Ricky W

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    The problem with the 10 and 20w chips is that they are made up of 1w leds. If your tank is shallow it might b okay but you need 3 w to actually pack a punch. I have them on some of my tanks but run them in conjunction with others and only cause I found this out afterwards. Would b better to get 3w leds and just make up a light. Think the 2nd pic you have there is from improved living. You can get all you would need from them.
     
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