REPTI ZOO 2 Pack Heat Lamp 100W Intense Basking Spot Simulated Natural Sunlight Heating Lamp Bulb Review (2026)

What these bulbs put out

Each bulb in this REPTI ZOO pack screws into a standard E26 socket and combines visible light, heat and UVA output in one incandescent style basking spot bulb, a format meant to simulate the daytime sun a basking reptile would get outdoors rather than only warming the air. REPTI ZOO markets the bulb around a vacuum aluminizing process on the internal reflector that the company says raises bulb efficiency, and rates the bulb for roughly 2,000 to 3,000 hours of use before it needs replacing, which at typical daytime basking schedules works out to a matter of months rather than years. The pack ships as two bulbs, so a spare is on hand when the first one burns out, sparing a keeper from running a tank with no basking heat while waiting on a replacement to arrive.

Setting it up safely

Because this is a straightforward on-off basking bulb rather than a thermostat controlled heat source on its own, it needs to run through a dimming thermostat or a rheostat to hold a basking spot at a safe target temperature rather than left plugged directly into an outlet. Without that control layer, a 100 watt bulb mounted close to a small or shallow enclosure can push the basking surface well past what most species can safely tolerate, especially in a glass tank with a tight fitting lid that traps heat rather than venting it. The bulb's beam is fairly focused rather than flooding the whole enclosure with light and warmth, which is the point of a basking spot bulb, but it also means placement directly over a basking platform or rock matters more than it would with a broader, lower wattage bulb.

UVA output and daytime behavior

The visible light and UVA this bulb produces support natural daytime behavior in baskers, since many diurnal reptiles use light cues tied to their basking routine to regulate activity, appetite and general alertness, separate from the UVB a dedicated UVB tube provides for vitamin D3 synthesis. That distinction matters because this bulb is not a substitute for a UVB source, and species that need UVB for calcium metabolism still require a separate fluorescent or mercury vapor UVB fixture running alongside a basking bulb like this one. Running the basking bulb on a normal daytime photoperiod keeps the light and heat cycle aligned with what a UVB tube on the same enclosure should already be doing.

Sizing the bulb to the enclosure

A 100 watt bulb is sized for a mid to large enclosure where the bulb can be mounted with enough clearance above the basking area to spread its heat across a reasonable radius rather than concentrating it on a small hot spot right under the fixture. In a small or shallow tank, the same bulb mounted close to the animal can create a basking zone that is too intense even with a thermostat dialed back, so keepers with smaller enclosures are often better served by a lower wattage basking bulb rather than trying to run this one on a very low thermostat setting. REPTI ZOO backs the bulb with a free replacement policy for problems within three months of purchase, though that coverage typically excludes the glass and light output itself wearing down with normal use.

How it compares to other basking bulbs

Against the Exo Terra Sun Glo halogen basking lamps rated at 75 watts, this REPTI ZOO bulb runs hotter at 100 watts and ships as a 2 pack rather than a 4 pack, so buyers comparing the two should weigh total bulb count against per bulb wattage for their specific enclosure size. Compared with Zoo Med's own 100 watt basking bulb, sold both as a 2 pack value option and as a single bulb, the core function is similar, an incandescent spot bulb with a reflective housing, and the choice between REPTI ZOO and Zoo Med often comes down to price and brand familiarity rather than a meaningful difference in heat output. Buyers who want UVB bundled into the same bulb should look instead at REPTI ZOO's own self ballasted UVA UVB basking bulb, since this particular 2 pack is heat and UVA only, without a UVB component.

Frequently asked questions