AquaIllumination's AI Hydra 64 HD draws up to 135 W across 8 channels, named here as myAI names them: UV, Violet, Royal, Blue, Green, Red, Moonlight and Cool White. Below is its spectrum with every channel at 100%, read from AquaIllumination's own published graph.
Set its channels in the comparer
Peaks near 412, 455 and 665 nm.
Royal blue 30%, blue 29%, green 14%, red 12%, violet 9% and yellow 6% of its power.
With JavaScript on, type the light's height above the water and the coral's depth and the page works out a range.
This is an estimate built from a few hobbyists' readings, not a measurement. The range is wide on purpose, because those readings disagree, for some lights by nearly two times, and one owner's corals burned at a step the low end called small. It is for the spot right under the light; anywhere off to the side reads lower. A PAR meter reading beats it every time. PAR here is in µmol per square metre per second, the unit a PAR meter reads.
Spectrum read from AquaIllumination Hydra product page, graph 'Baseline Spectrum | All 100%' (one graph for the Hydra 32 HD and 64 HD). See the graph. The split between channels is a model fitted to that graph. Added together, its channels match the graph closely (R² 0.999), which shows the total fits; it can't show each channel is right.
myAI's HD mode lets a channel run above 100% when others are turned down; the app's sliders stop at 100%.
AquaIllumination's own page for it: AI Hydra 64 HD.
Where its PAR range comes from: The Hydra 32 HD's readings (DaniReef LAB): the 64 HD carries four of the same 16-LED clusters behind the same optics, so the same light per watt is taken. No reading of a 64 HD at a known depth was found.
reeffrags.com is not affiliated with or endorsed by AquaIllumination. The graph is theirs; the reading of it, and any error in that reading, is ours.
