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Exo Terra Reptile Uvb100 T5 8w Bulb

A 12in T5 UVB bulb for shade-dwelling, nocturnal and crepuscular reptiles

£23.99

· tracked · UK mainland estimate · 14-day promise

UK delivery £2.99 · free over £39

Secure checkout by Stripe · Card, Apple Pay & Klarna

Low output is the point, not a compromise

At 3% UVB this is deliberately the weakest bulb in the range: putting a desert-strength bulb over a forest-floor species can do more harm than good. The guidance is still to replace it on a schedule rather than by eye, since output falls before the tube visibly dims.

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Tracked delivery

Easy returns

Why we chose it

This is the one to reach for precisely because it is the weakest in the range: a shade-dwelling species does not need, and can be harmed by, the output built for a desert basker. Matching the UVB strength to the species is the actual job here, not buying the biggest number available.

— Matt, founder

Specifications

Material: T5 Very High Output (VHO) fluorescent tube with Sunergy™ phosphor blend, engineered in Germany
Care: UVB lamps should be replaced periodically: phosphors degrade and UVB output can fall below biologically effective levels while the bulb still emits visible light, so replace on the
Brand: Exo Terra
Material: T5 Very High Output (VHO) fluorescent tube with Sunergy™ phosphor blend, engineered in Germany

Full description

Not every reptile that needs UVB lives in the sun. Plenty of forest and understory species get their dose in dappled shade, which is a much lower dose than a desert bulb is built to give.

This is the weakest bulb in Exo Terra's T5 range: a Very High Output tube with the Sunergy phosphor blend, putting out just 3% UVB aligned with Ferguson Zone 1 and the Cryptophotic Zone. It is recommended for nocturnal and crepuscular, shade-dwelling species from forest and understory environments, and fits standard T5 fixtures and the Exo Terra T5 Terrarium Top.

12" T5 High Output tube, 8W
3% UVB output, the lowest in this range
Aligned with Ferguson Zone 1 and the Cryptophotic Zone
Recommended for nocturnal and crepuscular, shade-dwelling species
Fits standard T5 fixtures and the Exo Terra T5 Terrarium Top
For reptile, amphibian and invertebrate use only

Low output is the point, not a compromise. At 3% UVB this is deliberately the weakest bulb in the range: putting a desert-strength bulb over a forest-floor species can do more harm than good. The guidance is still to replace it on a schedule rather than by eye, since output falls before the tube visibly dims.

Who it's for: keepers of nocturnal or crepuscular, shade-dwelling reptiles and amphibians, forest and understory species that would get too much, not too little, from a stronger bulb.

Delivery

Tracked UK delivery — your estimated arrival date is shown above and updates automatically. Standard delivery £2.99, and free on orders over £39. Full details on our delivery information page. Delivery information

Returns

14 days to change your mind, no interrogation. Items need to be unused (sensory products unopened, for hygiene). Full details on our delivery & returns page.

Payment

Secure checkout by Stripe — cards, Apple Pay, Link and Klarna. We never see or store your card details.

Common questions

What UVB percentage does it put out?

3%, aligned with Ferguson Zone 1 and the Cryptophotic Zone.

What species is it suitable for?

Nocturnal and crepuscular, shade-dwelling reptiles and amphibians from forest and understory habitats.

Is this strong enough for a desert species?

No - it is the weakest bulb in this range and is built for shaded, low-UV environments rather than full sun.

How long does it last?

No interval is stated, but the guidance is to replace it on a schedule rather than by how bright it looks, as output fades before the visible light does.

How do I clean it?

UVB lamps should be replaced periodically: phosphors degrade and UVB output can fall below biologically effective levels while the bulb still emits visible light, so replace on the.

How long does delivery take?

Your estimated delivery date is shown above and updates automatically. UK orders are sent tracked — standard delivery is £2.99, and free on orders over £39.

How do I track my order?

As soon as your order is dispatched we email you a tracking link, so you can follow it all the way to your door.

What is it made from?

T5 Very High Output (VHO) fluorescent tube with Sunergy™ phosphor blend, engineered in Germany. Full specifications are listed above.

What if I need to return my order?

You have 14 days from delivery to change your mind. Just email us with your order number and we’ll send the return steps the same working day — see our delivery & returns page for details.

Why buy from Giddy Pets?

Carefully selected by pet ownersEvery product is chosen and quality-checked by people who actually live with dogs, cats and small pets.
Tracked delivery on every orderUK delivery with tracking as standard — and it’s free when you spend over £39.
UK customer supportReal, UK-based humans read every email — usually Matt, the founder. No bots, no ticket numbers.
Easy returns14 days to change your mind, no interrogation. If it’s not right, we’ll make it right.