Fixture · Kessil · LED puck
Kessil A360X Tuna Blue
The shimmer king. Dense beam means amazing visual depth but tight spread — most reefers run 2 per 4 ft.
At a glance
- Max draw
- 90 W
- Coverage
- 24″ × 24″ at 12″
- Mounting height
- 12″
- Street price
- $420
PAR at depth (μmol/m²/s)
| Depth | Center | Edge | Notes |
|---|---|---|---|
| 6″ | 620 | 110 | Hotspot in center, fast falloff at edges |
| 12″ | 380 | 90 | |
| 18″ | 230 | 60 | |
| 24″ | 140 | 40 |
All readings corrected for underwater use. Center = directly under fixture; edge = at the 24″ × 24″ footprint edge. PAR varies by individual fixture setup, mount type, and tank glass — use these as a sizing baseline, then measure with your own meter.
Spectrum channels
- uv
- royal blue
- blue
- cyan
- warm white
- cool white
Best for
- ▸ SPS show tank
- ▸ Shimmer-first builds
Pros
- + Unmatched shimmer (closest to halide)
- + Built-in WiFi
- + Tank-of-the-month favourite
Cons
- − Tight beam needs careful spacing
- − Spectrum less programmable than Radion / Hydra
Where to buy
Kessil A360X Tuna Blue
Pendant-style. Best 'shimmer' in the hobby. 24×24 in coverage.
View on Amazon →
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PAR data source
BRS A360X re-test (2020) — multi-fixture spacing guide.
Next steps
- ▸ Correct your PAR meter reading using the PAR underwater calculator — Apogee MQ-500 / MQ-200 in-air sensors under-read by ~25 %.
- ▸ Convert peak PAR to DLI with the DLI calculator — that's the metric corals actually care about.
- ▸ Reference the lighting guide for PAR targets by coral type.
Last reviewed