Zoo Med ReptiSun 10.0 T5 HO Review: The Sensible Default

The lamp most bearded dragons in the world are kept under, sold two at a time.

The verdict: The ReptiSun 10.0 T5 HO is the reference linear UVB lamp for desert species, and the two pack turns an annual chore into a purchase you make every eighteen months. Buy it if you already own a T5 HO fixture. Do not buy it expecting it to work in a T8 fixture or a compact hood, because a T5 HO lamp needs a T5 HO ballast.

Specifications

Specifications above come from Zoo Med's published product information. Treat pricing as approximate, since Amazon pricing moves.

What it does well

• It is the lamp the hobby standardised on, which means mounting distance guidance, meter readings and keeper experience for it are abundant and consistent.
• A linear tube spreads UVB across the basking area rather than concentrating it in a spot, which is the whole reason linear beat compacts.
• Buying two at once removes the most common lighting failure, which is a lamp that is fifteen months old because nobody had a spare.
• Twenty four watt tubes fit the 22 to 24 inch fixtures that come with most starter kits.
• Cost per year of correct UVB is low, which matters more than the sticker price.

Where it falls short

• A T5 HO tube will not run in a T8 fixture. Buying the wrong lamp for your hood is the most common purchase error here, and the lengths look similar.
• Twenty four inches is short for a 48 inch enclosure. Match tube length to roughly half to three quarters of the enclosure, over the warm end.
• Output falls invisibly. The lamp keeps lighting long after the UVB has faded, so replacement is a calendar task, not a judgement call.
• Lamp quality does not fix a bad fixture. A tube in a hood with no reflector delivers far less to the animal than the same tube in a fixture with a good one.
• Two lamps stored for a year is fine, but do not buy four and expect the last one to be as good, since shelf time is still time.

What owners report

ReptiSun T5 HO lamps have the longest track record of any reptile UVB tube and owner reports reflect that: they work, they are widely available, and the failures people report are almost always mounting rather than the lamp. The most repeated mistake is a tube sitting too far above a fine mesh screen, which quietly halves what reaches the animal.

The second most repeated mistake is running a T5 HO tube in the wrong fixture. If your hood is a T8, buy a T8 lamp or replace the fixture, and read our T5 versus T8 comparison before you decide which. If you are coming from a compact coil bulb, the coil versus linear comparison explains why the switch is worth making regardless of brand.

Whatever you fit, the target is a UV index of roughly 3 to 4 at the height of the dragon's back on the basking platform, with shade available. The distance and replacement guide covers how to get there.

Who it suits

• Anyone who already owns a working 22 to 24 inch T5 HO fixture.
• Keepers who want the lowest cost route to correct UVB and will replace on schedule.
• People who have been burned once by realising the lamp was overdue and no spare was in the house.

Who should skip it

• Owners of T8 or compact fixtures, who need a lamp that matches the ballast.
• Keepers with a 48 inch enclosure and no fixture yet, who should buy a 36 inch kit rather than a 24 inch lamp.
• Anyone whose fixture has no reflector, where the fixture is the upgrade that matters.

Alternatives worth considering

Keep reading

• T5 vs T8 UVB compared
• Coil UVB vs T5 linear UVB
• UVB distance and replacement guide
• What is UVB
• Hygger T5 UVB kit review
• Arcadia ProT5 12% Desert 36 inch review
• Best UVB bulbs for bearded dragons

This review draws on published specifications, manufacturer figures and the consensus of verified owner reviews. We have not tested this product ourselves, and we say so rather than implying otherwise. As an Amazon Associate we earn from qualifying purchases.