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Kessil A360X

Kessil A360X

Scored on 104 verified owner verdicts, from 541 comments read across 7 communities
TL;DR
Most reef owners love its unmatched shimmer, natural color, and compact form for growing demanding corals, but flag weak PAR that often needs T5 help and units that fail near warranty's end.

71% of 104 verified owners recommend the Kessil A360X, based on real owner verdicts aggregated from Reddit, enthusiast forums, and YouTube.

See the problems 15 owners report →

What 104 owners say
541 comments reviewed · scored on the 104 clearest verdicts
71%
Recommend
74 owners
15%
Neutral
15 owners
14%
Don't recommend
15 owners
Source
Score
N
Counted in the score
Reddit
81%
59
Other forumsReef2Reef, Nano Reef, Reefcentral, Plantedtank, Enthusiast forums
52%
31
YouTubeiowner comments
71%
14
Reviewed, but not counted — and why
No clear verdictiSetup, tips & quirks
4

The headline score reflects owners (Reddit, enthusiast forums), independent lab tests, blogs with no affiliate links, and YouTube owner-comments when they line up with owners. is shown for perspective but kept out here — hover the i for why.

What owners like
  • Beautiful unique shimmer effect no other light matches · 22 · 21%
  • Excellent color and natural spectrum · 8 · 8%
  • Grows SPS and demanding corals well · 6 · 6%
  • Sleek small low-profile form factor · 6 · 6%
  • Easy control via knob or WiFi app · 5 · 5%
What owners flag
  • Very expensive for the performance · 10 · 10%
  • Weak PAR that often needs T5 supplementation · 5 · 5%
  • Units fail or die, sometimes just after warranty · 5 · 5%
Who it's for
A great fit if
  • Reef keepers growing SPS/LPS on nano to mid-size tanks
  • Aquascapers who want the signature Kessil shimmer effect
  • Planted-tank owners using the Tuna Sun for lush growth
  • Buyers wanting a compact fixture with simple knob or wifi control
Look elsewhere if
  • Budget shoppers (pricey, weak PAR per dollar)
  • Large or wide tanks needing even coverage without T5 supplementation
  • Those wanting vivid RGB colors on planted tanks (tones read dull)

Synthesized from what Kessil A360X owners say — not a spec sheet.

How buyers rate it elsewhere

Retailers' own star averages, for comparison — separate from our vetted owner-verdict score above.

Top quotes, sourced

541 reviewed · 104 shown
Sentiment
Community
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Reddit▼ don’t recommend

I have 3 point source led lights (kessil a360x) over a 5 foot tank and I wouldn't recommend something similar for 4 foot tank. T5ho or reef brite led supplement will be essential because otherwise only about 25% of the rock work will be suitable for spa. They'll die in their shaded areas.

YouTube▲ recommend

I’ve been running 3 a360x lights on my 210 reef for a year and I love them

Reddit— neutral

Scrapped them for an a360x...ended up adding a t5 hybrid to that because the a360 didn't seem strong enough for a mixed reef. With your footprint and doing soft corals, the a360x would do fine.

Reddit— neutral

My LFS has A360x's and A360's side by side on one of their displays and there is a noticable improvement in coloration. The A360x is a better light in terms of looks and I think slightly higher PAR.

Reddit▲ recommend

As someone who has AI’s on my main tank, and am going to use kessil on my second tank; I’d recommend getting the a360x. You can start with 2 of them and should be good for your needs.

Reddit▼ don’t recommend

I found Kessil to grow corals fine but coloration is just not as good. Switching to AI made a huge difference for me in coloration.

Reddit▼ don’t recommend

I had a360x (the shimmer is great but kind too much. the par is weak by itself compare to other light) also the orphek compact (pretty good better than the a360x for par but have disco ball effect for sure and the software is hard to use ) no I run the radion G5 pro

Reddit— neutral

I'm using a A360X on a 20g rectangle. Eventually I will add some sort of blanket light, weather it's t5 or an led bar.

Reddit▲ recommend

Kessils are amazing lights, love the shimmer, from the unique optics, + the small form factor and amazing quality, and the kessil logic, expensive though haha.

Reddit▼ don’t recommend

I currently have the a360x tuna blue and it does alright. Without buying the wifi controller or the spectrum controller you can't adjust much of the color. It also lacks any royal blue like many of the competitors contain. I Will be replacing mine with a Radeon G5 in the near future because I'm unhappy with the color spectrum.

Reddit— neutral

Kessil is basically a “pay for that shimmer” type of light for me. I have two a360x over a Red Sea 350. To me, the form factor was a huge selling point. They just look so cool!

Reddit▲ recommend

We have our tank in our living room with a kessil a360x and find the light it puts out to be pleasant for the room.

YouTube— neutral

They are brilliant lights shimmer is great and control is good too but the colours never match when you add multiple kessils together, you end up with bluer ones and greener ones and whiter ones, it really spoils the look of a bigger aquarium.

YouTube▲ recommend

I have 6x of them over my tank, love them

YouTube▼ don’t recommend

anyone else have problems connecting the POWER to the 360 itslef? the connection is NOT positive, like the other connections that push together, in fact it can become unplugged without any effort.

Reddit▲ recommend

I’m using a A360X and H80. Great lights!

Reddit▼ don’t recommend

I have 3 a360x and an aqua illumination t5 hybrid fixture, and the PAR is pretty low, around 275 at the highest point of my rock center of the tank with the most light intersection. I just thought it was because they had crap PAR output..

YouTube— neutral

Got my 360x from the LFS yesterday. Im super bummed that I can't control it with my Apex. the added cost for the bracket and the seemingly mandatory controller is something to consider (especially in Canadian monopoly money) when buying a new light.

Reddit▲ recommend

The a360x is the next step up and would serve this tank well. At 450USD, it can be a tough pill to swallow, but I'm sure you've fallen in love with the kessil shimmer.

Reef2Reef— neutral

With acropora, one 360x will cover roughly 12" to 18" square area. They're great lights, but because they are point source, you're gonna need more for coverage.

Reddit▼ don’t recommend

I think the bottom line is Kessil sucks at aesthetic illumination of planted tanks. I’m getting ready to sell my A360X Tuna Sun for the same reason. After seeing how amazing my plants looked with a modern RGB lamp, I can’t stand the Kessil’s dull colors. The Kessil emphasizes yellow and brown, which I don’t think anyone actually wants.

The Planted Tank Forum— neutral

I just switched from finnex 24/7 to 3 kessil A360WE's. The shimmer and light output is pretty crazy. I just wish the dawn/dusk lighting could go dimmer.

Reddit▲ recommend

They are Kessil a360x ‘Tuna Sun’ lights. It is their reef tank lights with a spectrum for planted freshwater. They work pretty well.

The Planted Tank Forum▼ don’t recommend

I've had mine for about 10 months now and have been struggling with GDA but I was running my intensity ramping up to 80%, 100% peaks throughout the day.

Showing 124 of 104

Common problems & things to know

Practical notes owners raise — setup, quirks, and issues to watch for. They don't say whether the person likes the product, so they're not counted in the score, but they inform the pros, cons, and who it's for.

Redditⓘ good to know

My 40 breeder SPS tank uses 3 of the kessil a360x to make sure every branch of acro is seeing significant PAR. At retail, with mounts, thats over $1500 of lights. A 36" t5 would have easily given me the same spread, at much less cost.

Redditⓘ good to know

Those are very bright lights .... one would have been enough had you not used the narrow reflector accessory

Redditⓘ good to know

I spent all my money on a a360x kessil and now im learning ill need some t5s or an led strip added on. At least once the corals start growing out.

Reef Central Online Communityⓘ good to know

The two A360WEs on my tank were purchased used to begin with and have been on my tank two and a half years now