Gear Score Methodology
PetPal Gear Score
Best Reef Aquarium LED Lighting (2026): Kessil A360XE, AI Hydra 32 HD & Red Sea ReefLED G2
Editorial synthesis of manufacturer specifications (Kessil, AquaIllumination, Red Sea), reef-retailer spec documentation (Bulk Reef Supply, Top Shelf Aquatics), and reef-keeping education from Bulk Reef Supply on PAR and coral lighting — no first-hand product testing. The Reef PAR & Spectrum Score is a composite of published specs and expert/hobbyist consensus, not a measurement, and PetPalHQ does not run a lighting testing lab. Ranks reflect each pick's best-fit use case — form factor, tank size, and budget — rather than raw score order. The score rates lighting capability and build within a pick's class and does not weight price, so a lower-scored fixture can rank ahead of a higher-scored one when it fits a specific buyer better.
Reef PAR & Spectrum Score = (PAR Output & Penetration × 0.35) + (Spectrum & Coral Coloration × 0.25) + (Control & Programmability × 0.20) + (Coverage Fit & Build × 0.20)Factor breakdown
PAR Output & Penetration
35%The core reef-lighting dimension: how much photosynthetically active radiation reaches the coral and how deep the fixture drives it. Bulk Reef Supply puts the ideal average reef PAR at roughly 100-200, with 200-400 PAR bringing out vibrant coloration. Fixtures with high rated output and deep manufacturer-stated penetration score highest — the Kessil A360XE leads here on its 24-to-30-inch stated penetration, while the 60W Red Sea G2 and 55W AI Prime, sized for shallower soft/LPS zones, score lower on raw depth capability.
Spectrum & Coral Coloration
25%How the diode mix grows and displays coral. Reef-proven spectra weight blue, royal blue, violet, and UV for fluorescence and growth, with red and green for fill. The seven-channel AI Hydra and the multi-channel Kessil and AI Prime score well for tunable, reef-tuned output; the Red Sea G2's REEF-SPEC Blue with boosted violet, UV, and 470nm blue is strong but fixed-spectrum; the NICREW's violet-and-blue mix is capable but less refined than the premium fixtures.
Control & Programmability
20%How precisely the fixture manages the daily cycle. App scheduling, sunrise/sunset ramping, per-channel control, and moonlight matter for both coral health and convenience. Built-in WiFi like the Red Sea G2's ReefBeat scores above fixtures needing a separate controller dongle, and per-channel granularity like the seven-channel Hydra scores above fixed-spectrum dimming. App polish counts: the established Mobius and ReefBeat platforms rate above the NICREW app.
Coverage Fit & Build
20%Whether the fixture actually fits and fills the tank it is sold for, plus housing and thermal design. Effective spread and depth versus the target footprint anchor this factor — the Hydra's tiling spread and the Kessil's penetration earn marks, while point-source beam evenness, fan noise on the small AI Prime, and heat management on dense panels count against. This factor rates fit and build, not price; the picks are ranked separately by best-fit use case and budget.
See all score methodologies on the Gear Score index.