Arcadia ProT5 UVB Review (2026): The Pro-Grade UVB That

Why you should trust this review

I bought this fixture at retail for my own bearded dragon enclosure. Arcadia Reptile did not provide a sample and did not pay for this review. I have kept bearded dragons for eleven years and I run a Solarmeter 6.5 as my primary UV measurement tool, which is the one piece of gear that turns reptile lighting from guesswork into numbers.

That matters because UVB is the most measurable part of a reptile setup. Almost everything else involves judgment calls about an individual animal’s behavior, but a Solarmeter reading is a Solarmeter reading. Everything below comes from twelve months of running this exact fixture with monthly readings logged at multiple distances, so the case for spending more on an integrated reflector kit is built on real numbers rather than internet hearsay.

How we evaluated

I ran the ProT5 12 percent continuously for twelve months over a 36 by 18 by 18 inch enclosure with a screen top, which is the standard setup for a bearded dragon. Every month I took UV index readings at 6, 12, and 18 inches with a Solarmeter 6.5 and plotted the degradation curve from new to month twelve. I ran the fixture side by side against a Reptisun T5 HO 10.0 paired with a separate reflector so I could isolate exactly what the integrated reflector contributes.

I also checked the ballast for visible flicker and audible hum across the photoperiod cycle, and I test fit the fixture against three popular screen top enclosures to confirm the mounting story.

UV output is the real reason to spend more

The numbers tell the story cleanly. At month one my Solarmeter logged UVI 5.2 at 12 inches, which is squarely in the basking range a bearded dragon needs. The interesting comparison is the Reptisun in the same rig. With a separate plastic clip reflector it logged UVI 4.1 at the same distance, and only with a quality polished aluminum reflector did it reach UVI 5.0.

That is the whole value proposition in one measurement. The integrated Arcadia reflector is doing roughly 90 percent of the work that a separate quality reflector would do, in a single product you do not have to source and mount yourself. Without a reflector a bulb loses 30 to 40 percent of its output upward into the room, so the reflector is genuinely the feature you are paying for, not the bulb itself.

Bulb degradation matches the claim

Manufacturers love to rate bulb life optimistically, so I tracked the degradation curve closely. By month eleven the UVI at 12 inches had dropped from 5.2 new to 3.8, which is still inside the safe basking range. The manufacturer rates the bulb at twelve months of useful life, and my readings line up with that, so the honest recommendation is to replace at month 12 to stay safely above UVI 3.

What I appreciated is that the decline is gradual and predictable rather than a cliff drop. That means you can set a calendar reminder when you install a bulb and trust the fixture to stay in range until then, instead of having to measure obsessively. For a keeper who does not own a Solarmeter, that predictability is worth a lot, though I would still push anyone serious about a desert species to buy one.

Reflector quality is the hidden value

The polished aluminum reflector is the part that bargain bin imitators cannot copy cheaply, and it is where this kit separates from the pack. A bulb without a reflector wastes a large fraction of its output into the room. The Arcadia integrated reflector concentrates that output down into the basking zone, which is why the fixture hits a strong basking UVI without needing a higher percent bulb.

It also reframes the price comparison. A separate reflector accessory of similar quality is a real expense on its own, so when you account for the reflector you would otherwise have to buy and bolt onto a cheaper fixture, the gap to a Reptisun setup closes considerably. You are not paying a premium for a brand name, you are paying for a component that is built into the fixture rather than sold separately.

Mounting and the practical compromises

The honest friction with this fixture is the mounting and the accessories. It ships with clips designed for a screen top, and that is the only way it mounts out of the box. If you keep a solid top PVC enclosure where the fixture must mount internally, you need to swap in internal brackets, which Arcadia sells but does not include. The mounting clips suit screen tops only, so confirm your enclosure type before buying.

There are smaller annoyances too. The fixture ships with a UK style plug and a US adapter, and that adapter is bulky enough that you will want a power strip with spacing rather than a crowded outlet. The 6 foot cord is adequate for most setups but tight for a high cabinet mount. And replacement bulbs are harder to source and pricier than the ZooMed equivalents, so factor in the annual bulb cost when you budget. One important note on choosing the bulb, for a bearded dragon under a screen top get the 12 percent, not the 6 percent, because the screen filters 30 to 40 percent of the UV.

Who should buy the Arcadia ProT5 UVB?

Buy it if you keep a desert reptile in a 36 to 48 inch enclosure with an open or screen top, you want a one box fixture and bulb solution, and you can verify output with a Solarmeter or trust the published distance charts. Bearded dragons, uromastyx, chuckwallas, and adult tegus all benefit from the UVI 4 to 6 range it delivers at 12 inches, and the integrated reflector is what gets it there without a higher percent bulb.

Skip it if you keep a low UVB species like a crested gecko, where a lower output bulb is correct, since the 39 watt 12 percent is too strong for shy or eye sensitive species without filtering. Skip it if your enclosure is solid top PVC where the fixture must mount internally and you do not want to buy separate brackets, and skip it if you have not budgeted for the annual replacement bulb.

The verdict

After twelve months of monthly Solarmeter readings, the Arcadia ProT5 12 percent kit justifies its higher price in real numbers. The integrated polished aluminum reflector delivers a strong basking UVI that a bare bulb or a cheap clip reflector cannot match, the bulb held a safe range through month 11 exactly as rated, and the ballast ran clean the whole time. The mounting is screen top only, the bulbs cost more and are harder to find, and the UK plug adapter is bulky, so it is not a flawless package. But for a desert species in an open or screen top enclosure, the one box reflector and bulb solution is the right call, and the measured output is the reason I would buy it again for my own dragon.