Too much light and the useful PAR range

Discussion in 'LED Aquarium Lighting' started by siidman, Nov 25, 2013.

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  1. siidman

    siidman Bristle Worm

    Joined:
    May 16, 2009
    Messages:
    136
    Location:
    Abq, New Mexico
    I've been planning on getting 3 Radion gen 2's for my future 180 mixed reef tank, Shrooms, Zoos, LPS, SPS... I've been reading and watching a whole lot of reviews of the Radeons and came across one by Mr. Saltwater where he tested the PAR readings though different depths of the tank and the results showed that at 70% of the Radeon's output the PAR reading at the depth of a few inches was well over 1000. So I think the useful range of PAR is 100-450 or so, which is now bringing me here to ask if there is a unusable range of PAR/light by coral? I know that corals an be burned by too much light, but is there a point where too much light/PAR is just too much and making it useless regardless of burning the coral? Sorry if I'm rambling or incomplete...I've been drinking a little. But while I'm at it, are there any other suggestions for LED fixtures for a 180, 72x24x24? I checked out the Kessils and liked them, but I like the Radeons more with all the cool functionality and extra wattage.
    Thanks fellas
     
    Last edited: Nov 25, 2013
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  3. Kevin_E

    Kevin_E Giant Squid

    Joined:
    Apr 30, 2009
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    Location:
    Florida
    "Sorry if I'm rambling or incomplete...I've been drinking a little."

    No need to apologize.
     
  4. m2434

    m2434 Giant Squid

    Joined:
    Jan 11, 2011
    Messages:
    3,471
    Well, IIRC there was a study recently that found that men think better after a few :)

    As for the question, the sun is pretty bright.... Many people have noted that corals in captivity often don't tolerate as much light though. I don't think anyone can give a definite answer for all cases. I suspect it's a combination of high inorganic nutrients, low usable forms of organic nutrients, lack of water flow for gas exchange, high accumulation of trace metals and other toxins, heterogeneous populations of algae and bacteria from all over, mixed into a small system with corals that may not have adapted too these competitors and an general heterogenous environment designed to keep animals with differing needs and natural environments together in an environment not necessarily favored by any etc... I.e. there is stress that the animals are not adapted too and this limited their metabolic and physiological functions.

    For lights the radio a are good if you have the money. Not too much and the LEDs will all lose intensity over time, so, dimming provides the ability to increase output to compensate over time. There are probably other good lights these days, I haven't been paying as much attention lately, so, I will defer that to others.
     
  5. Trumptitan

    Trumptitan Astrea Snail

    Joined:
    Nov 15, 2013
    Messages:
    52
    Location:
    CT
    I will say that I have been using the Reef Breeders lights on mine and several people in my club are using them as well with great success. The IT version has ramp up and down capability as well. Prices are VERY good comparatively speaking just doesn't have some of the connectablety of the radi's