REEF2REEF Saltwater and Reef Aquarium Forum

    #randybrs
    AI Hydra Translation of SPS AB+, Sep 21, 2018
  1. dave57

    #AskBrstv #RandyBrs
    Can you guys verify this with a spectrometer?

    quoting, Stephen Mc Gowen
    “Last week the question came up about the equivalent percentages for the BRStv SPS AB+ Spectrum program. BRStv shared their settings for an AI Prime HD and there are lots of variations on this schedule available, as a download from this page. The question that was asked was if there was a translation of this for a 52 HD. Although the 52 HD is 4 LED pucks, to the Prime HDs 1 puck, the power available on each channel isn't just a 4 times what you'd get from a Prime. So I pulled together the data and worked out the equivalent values for the SPS AB+ program for a Prime HD, a 26 HD and a 52HD.

    For those who only want the results, here they are. The percentages are given to 2 decimal places, which obviously you can't do in the app but the values can just be rounded to the nearest whole number:

    26 HD:
    UV - 117.98% (ie. max)
    Violet - 101.27%
    Royal - 82.34%
    Blue - 64.64%
    Green - 5.54%
    Deep Red - 5.16%
    Cool White - 19.03%

    Honestly I don't think there's a lot of difference for a 26HD, I'm not convinced it will make a huge difference. Overall it uses almost 3.5 Watts less power, so adjusting to this may meant less PAR getting to your coral.

    52 HD:
    UV - 156.40% (ie. max)
    Violet - 135.11%
    Royal - 118.87%
    Blue - 77.21%
    Green - 10.55%
    Deep Red - 8.83%
    Cool White - 27.10%

    This program is very different. It makes use of the HD range of the Royal colour channel as well. It also uses an additional 12 Watts of power, than the standard AB+ program, so it should meant significantly more PAR getting to your corals.

    Now, for those who are interested in how I came up with these numbers. The AI lights have a max amount of milliWatts (mW) they can handle and a max amount of mW per colour channel as well. Using this I worked out the total amount of mW used by the SPS AB+ program and then worked out the percentage of that total that was allocated to each channel. At this point I have to make an assumption, that the color spectrum of each colour channel, will stay the same, no matter how much power is being driven through it...as far as I know, because of how LEDs work, this is a fair assumption (open to critics of this, if I'm wrong). Lastly I calculated the equivalent power distribution between all of the colour channels, for the Hydra 26 HD and Hydra 52 HD, before converting everything back to percentages, to share.

    If anyone has any questions about how this all worked, or criticisms let me know. The data behind the numbers above can be seen at this link. David Garcia thanks for the help”
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