← UNS 75A Dual AIO (Standard) · All nano reef lights
Best lights for the UNS 75A Dual AIO (Standard)
Match the fixture's coverage footprint to your tank's display footprint — a light rated for a 12×12 in area is a poor fit over a 16×16 in tank. Then pick an intensity tier based on your corals: low for soft corals or FOWLR, medium for LPS or mixed reefs, high for SPS. Most nano light manufacturers don't publish PAR, so coverage and intensity tier are the practical sizing handles.
The UNS 75A is a Standard-size Dual All-In-One from Ultum Nature Systems, rated 40.1 gallons at 29.52 × 17.71 × 17.71 in in 8mm glass, with an integrated rear triple-chamber filter driven by a dual-pump setup. It ships without a light, and UNS publishes neither flow (GPH) nor rear-chamber internal dimensions, so size equipment by measurement. At 40 gallons it sits at the larger end of the AIO range.
Ranked for an LPS / mixed-reef setup. For SPS or soft-only goals, use the sizing tool.
No seeded light cleanly fits this tank at the default setup. The full comparison below shows why; try the sizing tool to adjust corals/bioload.
All lights compared
| Light | Coverage | Intensity | Price | Verdict |
| Fluval Marine 3.0 Nano (20W) Fluval | 9×9″ | Low | $109.99 | Too dim for goal |
| AI Blade Grow 12" Aqua Illumination | 12×12″ | Medium | $263.99 | Not ideal |
| Fluval Marine 3.0 (22W, 15-24") Fluval | 24×12″ | Medium | — | Not ideal |
| Kessil A160WE Tuna Blue Kessil | 24×24″ | Medium | $259.00 | Not ideal |
| Kessil A80 Tuna Blue Kessil | 24×24″ | Low | $139.00 | Too dim for goal |
| Nicrew HyperReef 50 (Gen 2) Nicrew | 24×24″ | Medium | — | Not ideal |
| AI Prime 16HD Reef Aqua Illumination | 24×24″ | High | $264.99 | Not ideal |
| Reef Breeders Reef Nano LED Reef Breeders | 24×24″ | High | $169.99 | Not ideal |
FAQ
Why use coverage footprint and intensity tier instead of PAR?
Most nano fixture manufacturers don't publish PAR data, so PAR-based comparisons aren't possible across the market. Coverage footprint and intensity tier give you a consistent, actionable way to match a light to your tank size and coral type without needing a PAR meter.
What intensity tier do I need for a mixed LPS reef?
Choose a medium-intensity fixture for a mixed LPS or mixed reef tank. Low-intensity lights are sufficient for soft corals and FOWLR setups, while high-intensity fixtures are needed only if you plan to keep demanding SPS corals.
Can I use a light rated for a larger footprint than my tank?
Yes, but it introduces more risk than benefit on a nano. You may end up with excess intensity at the center and uneven coverage, and you'll pay for output you don't need. Matching footprint closely is the better approach.