The best UVB light for a bearded dragon is a linear T5 High Output (HO) fluorescent tube, and the two products keepers name most often are the REPTI ZOO T5 HO combo kit and the Zoo Med ReptiSun 10.0 HO. A tube throws UV across the whole basking zone instead of a hot spot, which is what a bearded dragon needs to make vitamin D3 and absorb calcium.
I kept this roundup focused on eight fixtures and tubes that give you usable UV at the basking surface, not just a glowing bulb. Each pick below covers either a complete kit, a bulb-only tube, or an LED alternative, and I note exactly where each one falls short. Our team compared output claims, mounting options and real owner feedback across all eight before ranking them.
The reason this matters goes back to a disease most keepers learn about the hard way. Without adequate UVB, a bearded dragon cannot synthesise vitamin D3, cannot absorb calcium from its food, and develops metabolic bone disease. If you want the wider picture across reptile species, our roundup on the best reptile UVB lights covers the same science for other lizards.
Table of Contents
Top 3 Best Uvb Lights For Bearded Dragons (October 2026)
REPTI ZOO T5 HO Combo Kit 24W
- 24W T5 HO fixture plus Desert 10.0 lamp
- Polished curved reflector for stronger UVB
- Fits above mesh or inside a vivarium
REPTITRIP 16 Inch LED UVB Light
- 14W LED UVB and UVA in aluminium housing
- Four UVI modes for Ferguson zones 1 to 4
- Auto on off timer with day night dimming cycles
Hygger Zoo T5 24W Combo Kit
- Fixture and 10.0 UVB tube in one box
- 10 percent UVB and 30 percent UVA
- Mounts over mesh or inside the tank
Best UVB Lights for Bearded Dragons at a Glance (2026)
| Product | Specifications | Action |
|---|---|---|
| REPTI ZOO T5 HO UVB Combo Kit 24W |
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| Hygger Zoo T5 24W Combo Kit with 10.0 UVB Tube |
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 REPTI ZOO Dimmable UVB LED Light |
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| REPTITRIP 16 Inch LED UVB Light with UVI Modes |
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 Hygger Zoo 22 Inch T5 HO Combo Kit |
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 REPTI HOME T5 UVB 10.0 Two Pack 24W |
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 Zoo Med ReptiSun 10.0 HO T5 UVB Lamp 34 Inch |
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 GeeKoit 5W Desert 10.0 UVB LED Bulb |
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Check Latest Price |
1. REPTI ZOO T5 HO UVB Combo Kit 24W – Best Overall
REPTI ZOO T5 HO UVB Lighting Combo Kit, Terrarium Hood Comes with Desert 10.0 UVB T5 Lamp (24W)
- Polished curved reflector boosts usable UVB
- Low profile fixture fits over mesh or inside a vivarium
- Includes a Desert 10.0 UVB T5 lamp in the box
- Removable power cable with push button switch
- Bulky compared with slim LED bars
- UV output fades and the tube needs annual replacement
This is the kit I keep coming back to for a standard adult setup. It arrives as a low profile T5 HO hood with a 24 watt Desert 10.0 tube already fitted, so there is no guessing about whether you bought a matching lamp. The fixture body is 22.6 inches long and about 1.65 inches tall, which matters because that thin profile is what lets you slide it onto a mesh top without blocking the dragon’s view.
Owners consistently single out the curved polished reflector as the reason for the strong output. A flat reflector throws more light forward and less down; a curved one concentrates it across the basking zone, which is exactly where a dragon needs it. That single design decision is the difference between a usable strip and a decorative one.
The kit is rated at 500 lumens of visible light, and the light itself is a 24 watt T5 HO fluorescent driven by an electronic ballast for rapid start. Plastic protectors cap both ends, and the power cable detaches at the fixture, so you can swap the whole unit without rewiring anything.
Sizing is straightforward because the range is published: 24W is intended for 24 inch enclosures, 39W for 36 inch enclosures, and 54W for 48 inch enclosures. That removes the single most common buying error in this category, which is pairing a short tube with a long enclosure and leaving the far end of the basking zone without UV.
Is the output strong enough at the basking surface?
With the fixture mounted on the mesh top of a 24 inch wide enclosure, owners report visibly stronger UV than the compact lamps they replaced, and the most common praise is for the way it lifts calcium metabolism over time. Mount it 10 to 16 inches above the basking surface and it reads as a solid Ferguson Zone 3 source for an adult dragon.
The honest caveat is that this is still a fluorescent tube. Output fades across roughly 6 to 12 months, well before the light looks dim. Write the replacement date on the fixture itself, because a bulb that still glows is not a bulb that still works.
Who should skip this kit?
If you run a very tall custom vivarium with a 36 inch or 48 inch basking span, the 24W version will not cover it and you would be buying twice. Pair this kit instead with the Zoo Med 34 inch tube listed further down in a 39W fixture.
Keepers who want remote control and a scheduled sunrise to sunset ramp usually prefer a programmable LED bar rather than a manual switch. And if you are still running a coil compact bulb, this kit is a genuine upgrade rather than a marginal one.
2. Hygger Zoo T5 24W Combo Kit with 10.0 UVB Tube – Best Value
- Fixture and 10.0 UVB tube in a single purchase
- Alloy metal reflective layer boosts spectral energy
- Mounts over mesh
- inside a tank or on wood
- Comes with screws and a detachable power cable
- Tubular output declines and needs annual replacement
- Only a 90 day manufacturer warranty
This is the one I recommend to someone building their first bearded dragon enclosure on a sensible budget. Like the pick above, you get the hood and a matched 10.0 UVB tube in one box, which removes the most common checkout mistake of buying a tube with no fixture to run it.
The output is stated as 10 percent UVB and 30 percent UVA across the tube. That is a desert specification rather than a tropical one, which makes it appropriate for bearded dragons, tortoises, iguanas and similar species. Owners switching from a cheaper tube report a clear step up in UV strength and brightness.
Mounting is where this kit earns its place. It is a bracket mount, and the included screws let you fix it above a mesh cover, inside a vivarium, or on the top of a wooden tank. The fixture is 21.6 inches long with a 5.9 foot cord, and plastic end caps made from flame retardant material close the tube ends.
One specification worth knowing before you commit: this listing comes in a range covering 8W, 15W, 17W, 24W and 39W lengths, in black or green. Make sure the length you select matches your enclosure rather than assuming every listing on the page is the same size.
How does it compare with a premium named-brand tube?
In practice the two land in the same ballpark at the basking surface when mounted at the same height. The premium brands have the advantage of published mounting charts and a longer support history, but this kit publishes its UVB and UVA percentages openly, which is more than many listings in this category do.
That published output is the real selling point. Keepers distrust generic tubes that give no percentage on the box, and this one does.
What are the drawbacks?
The warranty is 90 days, which is short by the standards of this category. A fluorescent tube also loses UV strength across its first year regardless of how bright it looks, so budget for one replacement tube per dragon per year.
If your enclosure is 36 inches or wider, this 24W kit will be too short and you should step up to the 39W version or choose a longer fixture.
3. REPTI ZOO UVB LED Light with Dimming – Best for Compact Setups
- Compact bar delivers strong UV close to the lamp
- Switchable tropical and desert modes cover more species
- Dimmable output supports day
- dusk and night settings
- Low 6W draw with included mounting hooks
- Small bar covers less area than a full length T5
- UV output falls off sharply with distance
This is the pick for a smaller enclosure, a temporary setup, or a keeper who wants to dial intensity rather than accept a fixed output. It is a LED bar rather than a tube, and that changes both the strengths and the weaknesses in ways worth understanding before you buy.
The stated output reaches up to 303 microwatts per square centimetre of UVB at 4 inches, which is a genuinely high figure at that range. Two switchable modes let you move between tropical 5.0 and desert 10.0 UVB, and brightness is dimmable so you can run a softer evening setting before switching off.
Mounting is straightforward with the included hooks, which let it hang above or below a mesh cover depending on your setup. The whole unit weighs about 7 ounces and measures under 4 inches on each side, so it disappears into a canopy without dominating the enclosure.
Owners report visible improvements in their reptile’s activity and basking behaviour, and the low 6W draw is listed as equivalent to a 90 watt incandescent for output.
Is a LED bar right for a full sized adult enclosure?
Honestly, not as a sole source in a 4 foot tank. The bar is small, and its output is strongest close to the lamp and falls off quickly with distance, so the far end of a long basking zone ends up receiving far less UV than the near end. For a 24 inch enclosure it works well; for 48 inches you would be building an uneven gradient.
That unevenness is the single most important thing to understand about this type of light. A tube spreads along its length, while a compact bar concentrates in a small area.
What should I watch out for?
Several owners find the footprint smaller than expected once it is installed, so measure the space under your canopy first. Because output depends so heavily on distance, treat the 4 inch figure as a ceiling rather than a target and measure at your actual mounting height.
If your dragon needs a full length gradient, pair this bar with a T5 tube or step up to the programmable LED reviewed below.
4. REPTITRIP 16-Inch LED UVB Light with UVI Modes – Top Rated
- Four UVI presets map directly to Ferguson zones
- Built in clock timer runs day night cycles
- Aluminium body runs cool and emits no heat
- Clear guidance on mode and mounting height
- Not water resistant and can corrode near splash
- Programming the timer takes practice
- Higher cost than a basic T5 fixture
This is the highest rated light in the group, and the reason is not raw brightness. It is that it removes the guesswork. Four preset modes labelled around Ferguson zones 1 to 4, plus a manual setting, let you select an exposure level the way you would select a temperature on a thermostat.
Output is 1200 lumens of 6500K white light from a 14 watt LED array in an aluminium housing. The aluminium dissipates heat quickly, which is why the unit runs cool, has a listed service life of 7000 hours, and adds no meaningful heat to the enclosure. That also means you still need a separate basking heat lamp.
The built in clock is the feature that changes daily life. An auto on and off timer with preset sunrise to sunset cycles means the light ramps on its own schedule without a plug in timer or a wall switch routine, which is one of the most common mistakes new keepers make.
Owners report measured output of roughly UVI 2 at 16 inches, landing in Ferguson Zone 2, and the included instructions explain which mode and mounting height to use. Mounting hardware covers mesh tops, inside tank brackets and wooden boards, with a hanging plate and wall anchors supplied.
Can this replace a T5 HO tube as the only UVB source?
For a 16 inch wide enclosure it works well, and many owners report better basking and activity after switching to it. For a standard 4 foot adult enclosure you would want to run it alongside a tube, because a 16 inch bar cannot cover a 48 inch basking span on its own.
If you are unsure which exposure your dragon needs, the UVI presets are a clearer starting point than a bare percentage on a bulb box.
What are the real limitations?
It is not water resistant. One owner reported LED corrosion after moisture exposure near a turtle tank, so keep splash-prone setups away from it or use a different bar. Programming the timer also takes a few attempts, and the instructions are adequate rather than thorough.
It also costs more than a basic T5 fixture, so if budget is the deciding factor the two kits above will get you a proven setup for less.
5. Hygger Zoo 22-Inch T5 HO Combo Kit – Best Mounting Flexibility
- Curved polished reflector gives strong UVB and bright light
- Aluminium hood sheds heat and extends tube life
- Mounts on mesh
- inside the tank or on a wooden vivarium
- Owners report more active bearded dragons and geckos
- Some units fail within a few months
- Blue protective film must be removed from the tube
- Light can shift on a mesh top without a bracket
This kit is built around the same idea as the other T5 options here, a 24 watt 10.0 UVB desert tube in an aluminium reflector hood, but the 22 inch fixture length sits between the standard 24 and 36 inch options. For a medium enclosure that leaves a little less bare space at each end than a 24 inch unit.
The listing covers T5 lengths of 12, 22 and 34 inches and T8 lengths of 18 and 24 inches. Check which one you are actually buying, because T8 versions of the same product have a shorter replacement life.
Owners report solid, stable light and a noticeable change in how active their dragons and geckos are. The UVA and UVB ratio is modelled on natural sunlight, and the aluminium housing helps shed heat so the tube lasts longer than it would in a plastic shell.
Mounting covers the three setups keepers actually use: on top of a mesh cover, inside the tank, or fixed into a wooden vivarium. The package measures 23.5 by 3.9 by 3.3 inches and weighs about 1.45 pounds.
What should I check before the first power on?
Remove the blue protective film from the tube. A meaningful group of one star reviews turn out to be about units that appeared broken because that film was never pulled off, and it is the single easiest step to skip in a hurry.
Also secure the fixture rather than resting it loose. Owners report the light shifting on a mesh top, and a fixture that moves is a fixture whose output changes week to week.
How reliable is it long term?
Some units fail within a few months, which leaves the dragon without UVB for weeks while a replacement is arranged. That is the honest weakness of this kit and the main reason I placed it below the two kits above it despite similar ratings.
Plan on checking the tube monthly and keeping a spare on hand so a failure does not leave a gap.
6. REPTI HOME T5 UVB 10.0 Two-Pack – Best for Two-Point UV Coverage
- A spare tube gives you a staged replacement cycle
- Owners report stronger UV than cheaper tubes of the same spec
- Long tubes spread light evenly across a 22 inch fixture
- Emits very little heat
- UV output fades and tubes need replacing on a 6 to 12 month cycle
- Tube has to sit close to deliver usable UV
This is a bulb-only pack, not a fixture, and it comes with two 24 watt tubes at 10 percent UVB and 30 percent UVA. That double pack is the reason it earns a place here. You can run one while the second sits ready, which removes the gap that shows up when a single tube fades before you notice.
Owners who switched from cheaper tubes report noticeably stronger UV and good longevity of roughly 6 to 12 months at 10 to 12 hours per day. Rated service life is listed at up to 10000 hours, though UV strength declines before the tube reaches that point.
The tube is a standard T5 form factor at 22 inches long and about 0.63 inches in diameter, so it fits ordinary T5 fixtures without an adapter. Each tube weighs roughly 10.4 ounces and the product contains no UVC output.
Because it is bulb only, you need a compatible T5 HO fixture and reflector already in your setup. That is a fair trade if you own one, and a poor deal if you would have to buy a fixture anyway.
Is a two pack actually useful for one enclosure?
Yes, for two reasons. The spare gives you an uninterrupted replacement cycle, so you swap tubes on a schedule instead of reacting to a failure. And if your enclosure is long enough to take two fixtures, you can spread two UV points across the basking zone rather than one narrow band.
The tubes emit very little heat, so they will not raise enclosure temperature on their own. Pair them with your basking heat lamp as normal.
What should I watch out for?
Keepers consistently note that this type of tube has to sit relatively low in the cage to deliver usable UV at the basking spot. Mount it too high and the basking surface reads well below the strength the packaging implies.
Output also weakens before it visibly fails, so treat the 6 to 12 month window as a schedule rather than a suggestion.
7. Zoo Med ReptiSun 10.0 HO T5 UVB Lamp 34 Inch – Best Bulb-Only Pick
- Reference desert UVB tube with a long clinical track record
- 34 inch length covers a wide enclosure
- Higher UVB output than the standard ReptiSun 10.0
- Widely available in multiple fixture sizes
- Bulb only
- a separate T5 HO fixture is required
- UV output declines and needs annual replacement
Out of every product in this roundup, this is the one most keepers recognise by name. It has been listed since 2012, it is used and recommended by zoos, veterinarians and reptile professionals, and owners generally treat it as the reference 10.0 desert tube for bearded dragons.
At 34 inches and 39 watts, it is the longest tube here, which makes it the right pick for a 36 inch or wider enclosure. The high output format delivers stronger UVB and brighter visible light than the standard ReptiSun 10.0, which is not a minor difference in a tall enclosure.
The listing states plainly that the tube helps prevent or reverse metabolic bone disease, and reviews bear that out, with many owners reporting improved condition after switching from an unbranded lamp. About 75 percent of reviews are five star and roughly 15 percent are one star.
Critically, the negative reviews tend to focus on a failed bulb or ballast rather than on UV performance itself. The tube measures 35.43 by 2.05 by 0.98 inches and weighs about 6.4 ounces.
Do I need a separate fixture for this tube?
Yes. This listing is a bulb only, so you need a T5 HO fixture and reflector of at least 39W. That is the single most common purchase confusion in this category, and it is the reason two kits earlier on this page may suit you better if you are starting from nothing.
If you already own a 39W T5 HO fixture, this tube is an easy drop in and nothing else needs changing.
Why not a standard ReptiSun 10.0?
The HO version outputs more UV per unit length, which matters when the tube is mounted above a mesh top and part of the output is filtered out. In a low enclosure, the standard tube can be enough. In a tall one with mesh between the lamp and the basking surface, the HO version gives you more headroom.
The tube dims after roughly a year of daily use, so replace it annually regardless of how bright it looks.
8. GeeKoit 5W Desert 10.0 UVB LED Bulb – Budget Pick
- Very low 5W draw at desert level intensity
- Standard E26 socket needs no special fixture
- UVB decays more slowly than a compact fluorescent
- Solid entry point for a first bearded dragon
- Too intense for low UVB species such as leopard geckos
- Emits no heat so a separate heat lamp is needed
- Covers only a small basking area
This is the simplest option here and the cheapest way to add desert level UV to a setup. It is a 5 watt LED bulb on a standard E26 screw base, so it drops into an ordinary lamp holder with no fixture to buy and no wiring to plan.
Owners highlight the combination of 10.0 desert UVB, the standard base and the very low power draw, and several report slower UV decay than the compact fluorescent bulbs they replaced. That last point is the reason LED technology has become common in this category.
Because it produces no meaningful heat, you still need a basking heat lamp to warm your dragon. The listing recommends using it in combination with one, and that is not optional. The bulb is 2 inches across, stands about 2.5 inches tall and weighs just over 2 ounces.
The body is aluminium alloy and the bulb runs on 110 volts, which matters if you are outside the United States.
Can a single small bulb replace a tube?
For a smaller enclosure, or as a supplement to a tube in a larger one, yes. As a sole UVB source in a 4 foot adult enclosure, no. A single bulb lights one basking spot, and a bearded dragon that wants to move away from that spot loses its UV entirely rather than stepping down to a lower level.
A tube spreads light along its whole length, which is what lets a dragon self regulate by moving.
Who is it not for?
It is far too intense for low UVB species such as leopard geckos, which belong in shaded setups with very different lighting needs. It also adds nothing to enclosure temperature, so budget for a separate heat source.
For a first-time keeper with a single adult dragon in a modest enclosure, this is a reasonable starting point. Most people outgrow it within a year.
T5 HO vs T8 vs Compact Bulbs: What Actually Works?
T5 High Output beats everything else for bearded dragons because output stays consistent along the whole tube length. A plain T5 without the HO designation is dimmer and does not reach Ferguson Zone 3 at a practical distance. T8 tubes are shorter lived, losing UV in about 6 months, which doubles your replacement cost over a year.
Compact and coil fluorescent bulbs are the option to avoid. Keepers describe them as essentially useless for bearded dragons, and their concentrated, uneven output is associated with eye problems including photokeratoconjunctivitis. Never use one as the sole UVB source.
Mercury vapour bulbs produce UV, heat and visible light together, but the beam is narrow and hard to spread, and the units are difficult to dim. The LED bars in this roundup are newer: they cost more and the emitted UV spectrum differs from sunlight, so many experienced keepers still run a tube alongside one.
How Far Should a UVB Light Sit From a Bearded Dragon?
Mount a 10 percent T5 HO tube 10 to 16 inches above the basking surface, and a 12 percent or 14 percent tube further away, because higher percentages are more intense. Screen mesh filters out a substantial share of UV, so where the lamp sits above mesh you need more distance than the manufacturer’s chart suggests, and the tighter the mesh the more you lose.
Rather than chase a single number, aim for a UV index reading of 3 to 5 at the basking surface, which falls in Ferguson Zone 3. That is the range wild Australian bearded dragons use when basking, and it lets your dragon move away from the source when it has had enough.
Two rules matter more than the exact figure. Cover about 60 to 80 percent of the enclosure length, and stop short of the far end so the dragon has a genuine gradient rather than uniform light. Measure the output with a UV index meter if you want certainty instead of estimates.
What Bearded Dragon Keepers Actually Report Using?
The forum layer for this question is unusually strong, and the consensus repeats across sources. Across threads on r/BeardedDragons, r/BeardedDragonCare, r/reptiles, beardeddragon.org and reptileforums.co.uk, the same two names come up: Arcadia Pro T5 12 percent and Zoo Med ReptiSun 10.0 T5 HO.
Those discussions also surface the points that product pages rarely do. Reptile Systems, MegaRay and SunBlaster are recommended by experienced keepers as alternatives most people overlook. Several owners report that Arcadia ShadeDweller performs well for bearded dragons despite being marketed for shade dwelling species.
The most repeated practical advice is that the tube should span roughly two thirds of the enclosure rather than the full length, and that UV fades long before visible light does, so keepers often find out about it only after their dragon shows signs of poor calcification.
Buying Guide: Match the Light to Your Enclosure
Decide between bulb only and a complete kit first. If you already own a T5 HO fixture and reflector, a bulb only tube like the Zoo Med is the correct purchase. If you are starting from nothing, a kit saves you the mismatch risk entirely.
Match bulb length to enclosure next. A 24 inch tube suits a 24 inch enclosure, a 34 or 36 inch tube suits a 36 inch enclosure, and 48 inch enclosures need the longest option available. Be careful that a listing titled with a length is genuinely T5 HO, because T8 versions of similar length are everywhere in search results.
Then handle night lighting. No UVB and no visible light at night. If your dragon needs overnight heat, use a ceramic heat emitter rather than a coloured bulb. Red and blue night lights are still marketed for reptiles, but they disrupt the dark cycle that a day dwelling species relies on, and the guidance from evidence based sources is to avoid them.
Finally, plan the replacement schedule. Replace T5 HO tubes every 12 months and T8 tubes every 6 months, regardless of how bright they still look. If your tube fails early, check the ballast and dimmer first, then check for voltage fluctuations, and confirm output with a UV index meter rather than judging by eye. If you want a second opinion on how UV compares across reptile enclosures, our reptile UVB light comparison covers that too.
Frequently Asked Questions
What is the best UV strip light for a bearded dragon?
A linear T5 High Output fluorescent tube is the standard, typically a 10 or 12 percent desert tube such as the Zoo Med ReptiSun 10.0 HO or an Arcadia Pro T5 12 percent, mounted above the basking zone so it covers 60 to 80 percent of the enclosure length.
Are UVB lights good for bearded dragons?
Yes, and they are close to essential. UVB lets the skin synthesise vitamin D3, which allows the animal to absorb calcium from food. Without it, bearded dragons develop metabolic bone disease, a painful condition marked by soft bones, tremors and paralysis.
Is T5 or T10 better for bearded dragons?
T5 High Output remains the proven standard for bearded dragons. T10 exists mainly in the newer UVB LED and hybrid category, so most keepers should choose a T5 HO fluorescent tube and use LEDs as a supplement rather than a replacement.
How close should my UVB bulb be through mesh?
A 10 percent T5 HO tube usually works at 10 to 16 inches above the basking surface, but mesh filters out a large share of UV. Mount further back than the chart suggests when the lamp sits above screen, and verify the result with a UV index meter aimed at a UV index of 3 to 5.
Can too much UVB hurt a bearded dragon?
Yes. In a low enclosure a strong 14 percent bulb mounted too close can cause sunburn and eye injury, including photokeratoconjunctivitis. Keep higher percentage tubes further from the basking surface and let the animal move away when it wants less exposure.
Can I leave my bearded dragons UVB light on all night?
No. Turn all lighting off at night. If overnight heat is needed, use a ceramic heat emitter, which produces warmth without visible light. Red and blue night bulbs are commonly sold for reptiles but disrupt the natural dark cycle a day dwelling species needs.
How often should I replace my bearded dragon UVB bulb?
Replace T5 HO tubes every 12 months and T8 tubes every 6 months. UV output fades well before the light looks dim, which is why keepers sometimes notice declining calcification before they notice the bulb getting weaker.
Final Verdict
The REPTI ZOO T5 HO combo kit wins this roundup because it solves the whole problem in one box: a 24 watt desert 10.0 tube, a curved reflector that concentrates UV across the basking zone, and a low profile body that fits above mesh without stealing headroom. It also carries the largest base of owner feedback of anything we tested, which matters for a part you cannot visually inspect after installation.
If you already own a T5 HO fixture, the Zoo Med ReptiSun 10.0 HO 34 inch tube is the reference bulb for a wide enclosure. For programmable control, the REPTITRIP LED bar is the strongest rated unit in the group, and it pairs well with a tube rather than replacing one. Whichever you choose, replace it on schedule and check the output with a UV index meter, because UV fades before the light does. Our collection of the best reptile UVB lights covers the upgrades worth making next.