Kessil A350W vs. A360W: Choosing Between Kessil's A-Series Tiers

Q: Should I consider a non-Kessil LED chip-based DIY build instead of either?

It depends on what's driving the decision. A commercial fixture like either A-series tier is a complete package — lens, driver, and Kessil's control ecosystem all integrated and tested together, with the trade-offs being primarily about output tier rather than build complexity. A DIY build using LED chips directly (covered in our Bridgelux vs. Cree comparison) trades that integration for more flexibility — more potential color channels, custom intensity targets, and generally lower cost per watt, at the expense of needing to handle lens, heatsink, and driver decisions yourself. If the appeal of a commercial fixture is mainly output and reliability without a build project, staying within the A-series and picking the right tier (this comparison) is the simpler path; if the appeal is custom spectrum tuning or cost-per-watt, a DIY build is the alternative worth researching.

By Hektor Jorgo Published November 19, 2031 Updated June 15, 2026 4 min read

A Kessil point-source LED reef light mounted on a gooseneck arm above a reef tank

Quick Facts

Shared Design Philosophy: Both are part of Kessil's A-series point-source LED lights, using a lens behind a single bright LED source to create the characteristic 'shimmer' effect
Tier Difference: The A360-series sits as Kessil's higher-output flagship tier; the A350-series sits a tier below in intensity
Best Tank Depth: A360-series suits deeper tanks or SPS-dominant setups that need more light penetration; A350-series suits shallower tanks or softie/LPS-leaning setups
Coverage Footprint: Both use the same point-source-behind-a-lens design, so footprint shape is similar — the main difference is intensity and penetration depth
Spectrum Naming: Kessil uses 'Tuna Sun' and 'Tuna Blue' style spectrum names across the A-series lineup
Controller Compatibility: Both work with Kessil's wireless dial and Spectral Controller accessories for dimming and scheduling
Mounting: Gooseneck arm or rail mount — the same mounting approach used across Kessil's A-series
Deciding Factor: Choose based on tank depth and whether the stocking plan leans toward SPS (more light) or LPS/softies (less intense light)

If you've narrowed down a reef lighting upgrade to Kessil's A-series and are now trying to choose between two tiers within that lineup, the good news is that the decision is simpler than it might look — both share the same fundamental design, and the choice mostly comes down to how much light your tank actually needs.

Short Answer

The A350-series and A360-series are both part of Kessil's A-series point-source LED lineup, sharing the same shimmer-producing lens design — the main difference between them is intensity tier. The A360-series sits as Kessil's higher-output flagship, suited to deeper tanks or SPS-dominant stocking plans that benefit from more light penetration. The A350-series sits a tier below, a reasonable fit for shallower tanks or softie/LPS-leaning setups that don't need (and can be stressed by) the most intense option. Both use the same mounting approach and are compatible with Kessil's wireless controller accessories — the decision is less "which design is better" and more "how much light does this specific tank need."

Same Design Family, Different Output Tier

Kessil's A-series fixtures share a core design approach: a point source of LED light positioned behind a lens, which produces the rippling "shimmer" effect on the substrate that point-source fixtures are known for (and that flat LED panels generally don't replicate as strongly). Both the A350-series and A360-series are built on this same approach — the lens design and the resulting shimmer and beam characteristics are broadly consistent across the family.

What differs between the tiers is output intensity. The A360-series is positioned as the higher-output option in the lineup, while the A350-series sits a tier below. This is the same kind of tiered-lineup structure you'll find in most reef lighting brands — a higher-output flagship and a lower-output option aimed at tanks that don't need (or shouldn't have) the most intense setting available.

Matching Tier to Tank Depth and Coral Mix

The practical question this comparison usually comes down to is: how much light does this specific tank need to reach the corals being kept?

Deeper tanks lose more light intensity by the time it reaches the substrate, so a higher-output fixture (A360-series) helps maintain adequate intensity at depth.
SPS-dominant stocking plans generally benefit from more intense lighting than LPS or softie-dominant plans — many SPS corals are adapted to higher-light reef zones, while many LPS and softies tolerate (and in some cases prefer) more moderate light.
Shallower tanks or softie/LPS-leaning stocking plans may find the A350-series tier sufficient without needing to dial down a higher-output fixture significantly from its capable range.

This isn't an absolute rule — individual coral species vary, and lighting acclimation over time matters too (our guide on how much white light corals need covers this in more general terms) — but it's a reasonable starting framework for choosing between the two tiers.

Shimmer, Coverage, and the Point-Source Trade-off

Because both tiers share the point-source-behind-a-lens design, the shimmer effect and general footprint shape are similar between them — this isn't a factor that differs much by tier. What the point-source design does trade off against is wide-angle, even-coverage designs, which is the comparison covered in our Kessil A80 vs. AI Prime 16HD guide. If shimmer and a point-source aesthetic are part of why Kessil is on the shortlist at all, that factor is consistent across the A350W/A360W decision — it only becomes relevant again if comparing against a non-point-source fixture entirely.

Controller and Mounting

Both tiers integrate with Kessil's wireless dial and Spectral Controller accessories for dimming, scheduling, and (with the Spectral Controller) more granular spectrum adjustment over time. Mounting is via gooseneck arm or rail mount, consistent with the rest of the A-series lineup — so a tank already set up for one A-series tier generally doesn't need different mounting hardware to switch tiers.

If You're Considering a DIY Build Instead

A commercial fixture — either A-series tier — is a complete, integrated package: lens, driver, and control ecosystem all designed and tested together. The alternative path is a DIY build using individual LED chips, which trades that integration for more flexibility in spectrum and cost-per-watt, at the cost of needing to handle lens, heatsink, and driver decisions yourself. Our Bridgelux vs. Cree comparison covers what that alternative actually involves, if cost or custom spectrum tuning (rather than output tier) is the main factor in the decision.

Quick Reference

Both the A350-series and A360-series share Kessil's point-source-behind-a-lens A-series design and shimmer effect
The A360-series is the higher-output flagship tier; the A350-series sits a tier below in intensity
Deeper tanks and SPS-dominant stocking plans generally favor the higher-output tier
Shallower tanks and softie/LPS-leaning stocking plans may find the lower tier sufficient
Shimmer and footprint shape are similar across both tiers — the difference is intensity and penetration
Both work with Kessil's wireless dial and Spectral Controller accessories
A DIY chip-based build is the alternative path if spectrum flexibility or cost-per-watt matters more than integration

Frequently Asked Questions

What's actually different between the A350-series and A360-series?

Both are part of the same A-series point-source design family — the difference is primarily a tier/intensity difference rather than a different design. The A360-series sits as Kessil's higher-output flagship tier, intended for situations that call for more light — deeper tanks, or tanks dominated by SPS corals that generally want more intense lighting. The A350-series sits a tier below in intensity, which makes it a reasonable fit for shallower tanks or stocking plans leaning toward softies and LPS corals that don't need (and can be stressed by) the most intense lighting available. Both share the same general point-source-behind-a-lens design, so the shimmer effect and footprint shape are broadly similar between them — the practical difference is how much light reaches the bottom of the tank.

Which one do I need for a deep SPS tank vs. a shallow mixed-reef tank?

As a starting point: the A360-series for a deep, SPS-leaning tank, and the A350-series for a shallower, mixed-reef or LPS/softie-leaning tank — but this is a starting point, not a hard rule. Light intensity requirements depend on tank depth, how many fixtures are running per tank, mounting height, and which specific corals are being kept (some SPS species tolerate a wider range than others, and some LPS/softies can adapt to brighter light over time with acclimation). If you're already running Kessil fixtures and considering whether to step up or down a tier, our guide on how much white light corals actually need covers the broader question of matching light output to coral needs, which applies regardless of which specific fixture tier you're using.

Do they produce the same 'shimmer' effect as the A80?

Yes — the shimmer effect comes from the point-source-behind-a-lens design that's shared across Kessil's A-series, including the A80, A350-series, and A360-series. A point source of light passing through a lens creates the rippling shimmer pattern on the substrate that's often cited as one of the main aesthetic advantages of point-source LED fixtures over wide, flat LED panels. Our Kessil A80 vs. AI Prime 16HD comparison covers this point-source design philosophy — including its trade-off against the AI Prime's wide-angle lens approach — in more depth, and the same trade-off (concentrated point-source vs. broader even coverage) applies when comparing any Kessil A-series fixture to a wide-angle alternative.

Should I consider a non-Kessil LED chip-based DIY build instead of either?

It depends on what's driving the decision. A commercial fixture like either A-series tier is a complete package — lens, driver, and Kessil's control ecosystem all integrated and tested together, with the trade-offs being primarily about output tier rather than build complexity. A DIY build using LED chips directly (covered in our Bridgelux vs. Cree comparison) trades that integration for more flexibility — more potential color channels, custom intensity targets, and generally lower cost per watt, at the expense of needing to handle lens, heatsink, and driver decisions yourself. If the appeal of a commercial fixture is mainly output and reliability without a build project, staying within the A-series and picking the right tier (this comparison) is the simpler path; if the appeal is custom spectrum tuning or cost-per-watt, a DIY build is the alternative worth researching.

Sources & Further Reading

About the Author: Hektor Jorgo

Co-Founder & Marine Biologist

Hektor is a co-founder of Sea Life Planet and has kept reef and freshwater aquariums for over 15 years. He holds a background in marine biology and focuses on species care accuracy, water chemistry, and tank husbandry.