Are LEDs a suitable primary light source?

However, determining if LEDs alone are viable sources of light, requires a better assessment. It’s certainly true that using multiple fixtures...
  1. Mandrew

    Mandrew Well-Known Member

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    I would like to hear details as well!
     

  2. A. grandis

    A. grandis Valuable Member

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  3. Cory

    Cory Valuable Member R2R Supporter Article Contributor

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    You cannot classify led as all led imo.

    The difference between one and another is night and day.

    Kessils are point source led clusters. While most of the others are not point source but spread out.

    Just as some metal halide bulbs are not good for growing coral, like a 4000k bulb, the same is true with led.
     
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  4. A. grandis

    A. grandis Valuable Member

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    Thanks for reviewing the article!

    Grandis.
     
  5. A. grandis

    A. grandis Valuable Member

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    I would think the quality of light is what determinate the ability and extension of it's use.
    The quality of LEDs can't change. The lenses are what makes their angle different. That's all.
    Marketing.

    Grandis.
     
  6. enzo

    enzo Active Member

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    "In my reef, PAR readings within 10 inches of an LED puck’s output range, a few inches below the water’s surface, usually hover around 250-300, dropping sharply the deeper an object is. Outside of that 10-inch range, PAR quickly drops to 160 on down to 100 and below. Considering that even LPS corals often grow best under blue spectrum light of at least 200 PAR, this can make for challenging growing conditions. Adding an additional fixture creates another lighting hotspot, which similar range. Many aquarists install LED lights thinking they are capable of growing corals in a 24x24 inch area of a tank. This is solely dependent on how the corals are placed and the depth of the tank, along with how high the lights are mounted. This fact has also encouraged the development of “frag flat” style tanks, which use a shallow build to maximize light penetration. We want coral frags to grow a uniform pattern with lots of surface area, making a desirable colony. Shadowing and PAR drops can cause corals to grow strange patterns, where one area of a coral has accelerated growth but other areas maintain dwarfed, due to lack of useable light. I would say that using LED lighting only requires careful, creative placement of corals, to ensure all the animals are getting adequate light."

    When the PAR meter is used on the LED's what intensity setting was the LED set on 10% 40% 60% or 100% it's not mentioned. Maybe those readings came at 50% intensity was this even looked at?
     
  7. enzo

    enzo Active Member

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    " We often think of LED lighting as relatively new technology, yet the ability to create electroluminescence was discovered in 1907. It wasn’t until 1951 that the first LED lights were created, primarily for commercial and industrial purposes."

    So your saying that since 1907 when LED's where first discovered they haven't changed?
     
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  8. JEKK

    JEKK Member

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    just saw this post, maybe you should check these lights out. (www.focustronic.net). They may give you a second view on LED as primary light source. Agree that LED is only as good as its lenses but a different story when you have an add-on technology to help with LED's disadvantage alone.
     
  9. Donovan Joannes

    Donovan Joannes Valuable Member R2R Supporter R2R Excellence Award Rest In Peace Build Thread Contributor

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    I run primarily on LED, simply because electricity is considered as premium utility in my country. To save cost.even further, I built my own fixture. It does grow coral with good coloration. Here are my tank with all channels are on. I do have SSC, I think the color is good.

    WP_20170320_18_24_25_Pro.jpg

    Sight_2017_03_15_055132_766.jpg
     
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  10. Donovan Joannes

    Donovan Joannes Valuable Member R2R Supporter R2R Excellence Award Rest In Peace Build Thread Contributor

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    Hopefully these corals will grow as good as what I have seen in R2R. 93 pieces of 3W generic LED from china, driven by 600ma driver. I am getting around 87000 LUX 6" from light source with all channels turned on.

    WP_20170311_15_34_53_Pro.jpg
     
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  11. jason2459

    jason2459 Not a paid scientist R2R Supporter R2R Excellence Award

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    I think it's kind of silly to question if LED only can be used successfully in 2017. For almost decade (or more?) now many reefers have successfully used LEDs for a primary or only light source.

    An article/research would be better spent on how to properly use LEDs as a primary or only light source. What style is better, puck, clusters, spread out, diffused, lens angels, brands, which color spectrums of LEDs are benificial, how many, does par = par etc etc etc. There's a huge topic there.

    As to the topic of this thread I kind of have a hybrid where my T5 is my primary focus but my LEDs are my primary light source.
    https://www.reef2reef.com/threads/r...nd-t5-installation-testing-and-review.292314/
     
    Last edited: Mar 23, 2017
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  12. jason2459

    jason2459 Not a paid scientist R2R Supporter R2R Excellence Award

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    An LED from one brand is not the same as an LED from another brand. Even from with in a Brand one LED from one bin is not the same as an LED from another bin.
     
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  13. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter Photo of the Month Award R2R Excellence Award Reef Squad Leader Build Thread Contributor

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    For several months after this article I wound up fielding questions as to why the photons from leds weren't any good. :rolleyes:
     
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  14. Dave1045

    Dave1045 Member

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    I use RapidLED fixtures and my coral growth just explodes. I love that Company! GREAT customer support too.
     
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