Kessil A500X Color LED Aquarium Light fit check
Kessil A500X Color LED Aquarium Light is a 185W reef light listing about 36x36 in of coverage and roughly 430 PAR at 18 inches. That clears ReefCrafter's PAR targets for soft coral, LPS, mixed reef, and SPS tanks. Tanks wider or longer than 36x36 in need a second fixture or a mounting plan that spreads light.
Kessil A500X Color LED Aquarium Light: fits roughly 75-150 gallon systems. Specs, compatibility math, sizing risks, and alternatives before you buy.
Who it is for
Good fit for
- ✓ 75-150 gallon systems, per the catalog fit range.
- ✓ Soft coral (50-150 PAR), LPS (100-200 PAR), mixed reef (150-250 PAR), and SPS (250-350 PAR) goals at about 18 in depth.
Not a fit for
- ✕ Tanks under about 75 gallons; it is sized above them.
- ✕ Systems over about 150 gallons without adding capacity elsewhere.
- ✕ Footprints larger than about 36x36 in from one unit.
Listed features
- dimmable color and intensity dials
- sub-controller compatible
Compatibility math
Coverage and PAR
Example: A common 75g footprint is 864 sq in; this fixture lists about 1,296 sq in and 430 PAR at 18 in.
ReefCrafter checks spread and intensity separately because a bright hotspot still leaves dim edges.
Risk notes
- The common mistake is buying a light that grows soft corals now but cannot support the mixed or SPS reef the keeper already wants.
- Large or SPS-heavy tanks may need multiple fixtures even when one light technically fits the gallons.
Professional fit context
- Match coverage width, coverage length, PAR at depth, mounting plan, and fixture count.
- Kessil A500X Color LED Aquarium Light fits roughly 75-150 gallon systems; confirm that range against the final display volume, sump volume, and livestock plan.
Alternatives to compare
- AquaIllumination Hydra 64HD Reef LED Black
Same 430 PAR at 18 in; compare format and features instead.
- EcoTech Marine Radion XR30 G6 Blue LED
Same 430 PAR at 18 in; compare format and features instead.
- Kessil AP9X LED Lighting Panel
470 PAR at 18 in vs 430: more intensity for higher-light corals.
Livestock this affects
- Zoanthids
Moderate light need; within this fixture's listed PAR.
- Acan coral
Moderate light need; within this fixture's listed PAR.
- Acropora
High light need; within this fixture's listed PAR.
- Birdsnest coral
High light need; within this fixture's listed PAR.
Full spec snapshot
- Category
- Lights
- Build tier
- Premium
- Estimated price
- $849
- Tank fit range
- fits roughly 75-150 gallon systems
- Format
- Puck LED
- Coverage
- 1,296 sq in
- PAR at 18 in
- 430
Related reading
Questions
Can the Kessil A500X Color LED Aquarium Light grow SPS corals?
Its listed 430 PAR at 18 inches meets ReefCrafter's SPS target of 250-350 PAR near the coverage center. Edges and deeper rock will read lower, so place SPS high and centered.
How large a tank does one Kessil A500X Color LED Aquarium Light cover?
The listing gives about 36x36 inches of coverage. A tank footprint larger than that needs another fixture or a raised, spread mounting plan to avoid dim edges.
What tank size is the Kessil A500X Color LED Aquarium Light for?
ReefCrafter's catalog fit range for it is 75-150 gallon systems. Confirm that against your final display volume, sump volume, and livestock plan rather than the box label alone.
What should I compare the Kessil A500X Color LED Aquarium Light against?
AquaIllumination Hydra 64HD Reef LED Black (Same 430 PAR at 18 in; compare format and features instead); EcoTech Marine Radion XR30 G6 Blue LED (Same 430 PAR at 18 in; compare format and features instead); Kessil AP9X LED Lighting Panel (470 PAR at 18 in vs 430: more intensity for higher-light corals).
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