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
- $400
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)
- + Onboard dials; K-Link app via optional WiFi dongle
- + Tank-of-the-month favourite
Cons
- − Tight beam needs careful spacing
- − Spectrum less programmable than Radion / Hydra
Where to buy
Affiliate links
Kessil A360X Tuna BluePendant-style. Best 'shimmer' in the hobby. 24×24 in coverage.View on Amazon →
Affiliate links. As an Amazon Associate, reefcalcs earns from qualifying purchases.
PAR data source
BRS A360X re-test (2020) — multi-fixture spacing guide.
Next steps
- Correct your PAR meter reading using the PAR underwater calculator — uncorrected, the Apogee MQ-500 reads about 24 % low underwater (×1.32) and the older MQ-200 about 7 % low (×1.08); the MQ-510 corrects itself.
- 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