The AI Prime 16HD has become the default LED for nano and small mixed reefs. After running one over a 20-gallon nano for six months, here is the practical performance data and where it shines or falls short.

PAR readings

  • Surface center: 600 PAR at 100%
  • 12″ depth center: 280 PAR
  • 12″ depth edges: 110 PAR

Coverage

Effective for 20″x20″ footprint at 12″ mounting height. Beyond that, you need a second unit or step up to the Hydra 32HD.

Verdict

The best LED on the market for nanos under 30 gallons. SPS-capable in tanks 18″ deep or shallower.

Related reef reading

Reef tools mentioned in this article

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Water Parameter Tracker

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