Zoo Med ReptiSun T5 HO Terrarium Hood, 24 Inch Review (2026)

What the hood is designed to do

This Zoo Med hood is built around a T5 HO electronic ballast, a format that produces roughly twice the UVB output of an older T8 fluorescent tube of the same length, which is why keepers reach for T5 HO fixtures on taller or larger enclosures where UVB needs to travel further to reach a basking perch. The housing is sized at 24 inches to hold a 22 inch T5 HO tube, and Zoo Med builds it with a low profile design and a highly polished curved reflector meant to direct more of the tube's output downward into the terrarium rather than letting it scatter upward and go to waste. A rocker switch mounted on the back of the hood turns the fixture on and off without needing to unplug it, a small convenience that matters on a rack or shelf where reaching behind an enclosure is awkward.

Bulb compatibility and what ships with it

The hood is built to run either Zoo Med's ReptiSun 5.0 or 10.0 T5 HO tube, giving keepers a choice between the lower output bulb suited to forest and tropical species and the higher output tube more appropriate for desert dwelling baskers like bearded dragons. Zoo Med's own current product page for this hood advertises it with a free ReptiSun T5 HO 5.0 UVB lamp included as a limited time offer, which is worth checking against the exact listing before buying, since fixture bundles like this can change and some retailers may sell the hood on its own. Either way, the tube is the part that actually produces UVB and needs replacing on its own schedule regardless of whether the first one arrived bundled with the hood or was bought separately.

Mounting and reflector performance

The curved reflector inside the hood is the feature that separates a dedicated fixture like this from a bare bulb holder, since it redirects light that would otherwise scatter sideways or upward back down toward the basking area, effectively increasing the usable UVB reaching the animal without increasing the bulb's wattage. That benefit depends on how the hood sits relative to the enclosure, and Zoo Med designs this style of hood to sit directly on a screen or mesh lid rather than being suspended well above it, since T5 HO output already drops off with distance and a close mounting position lets more of that output reach the animal than mounting the fixture higher above a heavily meshed lid would allow.

Fit for larger and taller setups

Zoo Med markets this hood specifically toward larger and taller enclosures, since T5 HO tubes maintain meaningful UVB output at distances where a T8 tube would already be too weak to matter for a basking animal. That makes the 24 inch version a common pick for adult bearded dragon or larger monitor setups housed in four foot long enclosures, where the tube's length lines up with a substantial share of the total tank footprint rather than trying to stretch a shorter fixture across the whole top. Smaller or shorter enclosures, especially anything under about 18 inches tall, often do not need the added output of a T5 HO fixture at all, and a compact T8 or compact fluorescent UVB bulb can cover those setups for less money and less heat near the basking spot.

Where this hood sits against rival T5 fixtures

Against the Arcadia T5 UVB fixture kit built around a 22.5 inch, 24 watt tube rated for 12 percent UVB desert output, the Zoo Med hood is the more general purpose choice since it is sold to pair with either the 5.0 or 10.0 ReptiSun tube depending on the species being kept, rather than shipping with one fixed output rating. Compared with Zoo Med's own smaller 14 inch T5 HO hood built around a 5.0 lamp, the 24 inch version obviously suits a much larger footprint and should not be assumed to work as a drop in replacement for a smaller tank. Against combo kits from REPTI ZOO or DXOPHIEX that bundle a reflector fixture with a bulb at a lower price, the Zoo Med hood carries the advantage of being a long established, widely stocked brand with bulbs that are easy to find for replacement years down the line.

Frequently asked questions