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do tortoises need a heat lamp?

Does A Tortoise Need A Heat Lamp At Night?

Since tortoises are cold-blooded (ectothermic), they can’t regulate their body temperature independently.

So, they require an external heat source. A heat lamp gives off UV radiation, which is essential for healthy bones and shells. However, problems can arise at night as tortoises need darkness to sleep.

Tortoises need a heat lamp, or an alternative heat source, at night when the temperature drops below 45 degrees Fahrenheit.

If the temperature stays around this level and the tank is insulated, tortoises will make the necessary adjustments by burrowing into their bedding to conserve their body heat.

You can turn the heat lamp on for a limited time at night or get in a lightless heat source, such as ceramic plates. You can use heating pads to warm up the tortoise, but their heat needs must come from above.

Do You Leave a Tortoise Heat Lamp on All Night?

Overnight heating isn’t required for a tortoise as long as the following conditions are met:

  • Nighttime temperatures don’t drop below 45 degrees Fahrenheit.
  • The tank is sufficiently insulated to hold in the heat during the day.
  • The tortoise can burrow into its bedding to preserve its warmth.

If these requirements are fulfilled, don’t leave a tortoise’s heat lamp on at night. You can turn it on short-term to increase the tank’s ambient temperature.

When To Leave A Heat Lamp On

You can keep the heat lamp on if you’re concerned that the temperature may get too cold for your tortoise at night (say, close to 50 degrees Fahrenheit). In this case, it’s a good idea to turn on the heat lamp at a low setting.

A temperature of around 45 degrees Fahrenheit should be enough to enable your tortoise to maintain a normal body temperature while asleep at night.

However, if the nightly temperatures in your area exceed this range, you can safely turn off the heat lamp.

how far should heat lamp be from tortoise?

Is It Bad For Tortoises To Have A Heat Lamp At Night?

A tortoise’s heat lamp mimics the cycle of the sun that a tortoise would experience naturally in the wild. However, the amount you use a heat lamp depends on the time of year and average daily temperatures.

Don’t leave a heat lamp on for more than 12 hours a day, as this could cause dehydration or heatstroke. Also, nighttime heat lamps make it harder for tortoises to sleep.

Do Tortoises Need a Heat Lamp?

Tortoises require a heat source in an enclosure because they’re indigenous to warm, dry climates.

They’re not adapted to the more temperate climates where most owners keep them. As cold-blooded creatures, tortoises require an external heat source to regulate their body temperature and digest food.

According to the Journal of Herpetology, tortoises rarely encounter heat stress in the wild, and they’re evolutionarily designed to survive or even thrive in high temperatures.

Putting your tortoise near a window is rarely enough to fulfill your tortoise’s needs. Likewise, even direct exposure to the sun may be insufficient during the winter months or in regions where long-term sunlight is rarely available.

Even though all pet tortoises need a heat lamp or heat source, not all have the same heating needs. Certain species require slightly higher temperatures than others.

This table shows the ideal temperature range for different species of tortoises:

Tortoise SpeciesTemperature (F)Temperature (C)
Red-Footed Tortoise90 – 95°F32 – 35°C
Juvenile Red-Footed Tortoise95 -100°F35 – 37°C
Russian Tortoise90 – 100°F32 – 37°C
Juvenile Russian Tortoise95 – 105°F35 – 40°C
Hermann Tortoise90 – 95°F32 – 35°C
Juvenile Hermann Tortoise95 – 100°F35 – 37°C
Greek Tortoise90 – 100°F32 – 37°C
Juvenile Greek Tortoise95 – 105°F35 – 40°C
Leopard Tortoise85 – 95°F29 – 35°C
Juvenile Leopard Tortoise90 – 100°F32 – 37°C
Pancake Tortoise95 – 100°F35 – 37°C
Juvenile Pancake Tortoise100 – 105°F37 – 40°C
Indian Star Tortoise90 – 95°F32 – 35°C
Juvenile Indian Star95 – 105°F 35 – 37°C
Box Turtle Tortoise80 – 90°F26 – 32°C
Juvenile Box Turtle90 – 95°F32 – 35°C

Juvenile tortoises require more heat than adult tortoises. Since juvenile tortoises are developing, they require more assistance regulating their body temperature.

Tortoise Heat Lamp Wattage

When you get a bulb for a heat lamp, you won’t find a label that states how hot it is. That’s because two heat lamps of the same wattage can give off different temperatures.

This depends on how far away your tortoise is from the source. The further away your tortoise is from the heat source, the lower the temperature it’ll experience.

The exact wattage of the heat bulb isn’t as relevant as how far the heat lamp is from the tortoise.

How Far Should Heat Lamp Be From Tortoise?

This table allows you to work out the correct bulb wattage to use, taking distance into account. Note the dimensions of your tortoise enclosure and the specific temperature needs of your pet tortoise.

You can use this table to determine the optimal wattage:

Wattage (W)DistanceTemperature
50W4″104°F
50W8″81°F
50W12″73°F
75W4″120°F
75W8″91°F
75W12″81°F
100W4″131°F
100W8″113°F
100W12″90°F
100W4″144°F
100W8″131°F
100W12″126°F

Don’t fit the heat lamp less than 4 inches away from your tortoise, or your tortoise could get burnt.

Do Tortoises Need Heat Lamp in Summer?

When average temperatures are higher than usual, your tortoise may not need the heat lamp. However, your tortoise will need daily exposure to UV radiation to stay healthy even when the temperatures are high.

You can start by lowering the heat lamp wattage (or increasing the distance) during the summer. After making these changes, if your tortoise remains healthy, you have struck the right balance.

Can You Use a Heat Mat for a Tortoise?

Although heat mats are used for lizards and snakes, they shouldn’t be used for tortoises. Heat mats or pads are heated surfaces placed on the enclosure floor.

When in use, the tortoise will sit on the mat to absorb heat when it needs to. While this may provide the perfect heating mechanism for many reptiles, it’s not beneficial for tortoises.

Heat mats don’t deliver heat in a manner that’s beneficial for tortoises. Tortoises require their heat source to come from above, while a heat mat provides heat from below.

If you use a heat mat in an enclosure, the tortoise will receive just 35% of the heat.

do you leave a tortoise heat lamp on all night?

How to Keep a Tortoise Warm Without a Heat Lamp

There are ways to keep your tortoise warm without using a heat lamp. As mentioned, a heat mat may be fine for some reptiles, but it is not good for tortoises.

Here are some alternatives:

Ceramic Plates

Ceramic plates are usually screwed into the same light bulb socket used for heat lamps.

Also known as ceramic heat emitters, these devices emit heat without visible light. According to the Handbook of Exotic Pet Medicine, this can be useful when tortoises need to sleep in darkness but remain warm.

They can be set to provide as much warmth as a heat lamp provides, creating the ideal basking environment.

Mercury Vapor Bulbs

According to the American Journal of Veterinary Research, tortoises generate more vitamin D when exposed to natural sunlight. If your tortoise can’t sunbathe all day, mercury vapor bulbs are a viable alternative.

Mercury vapor bulbs and traditional heat lamps provide heat and UVB rays. Normally, a heat lamp has to be supplemented with a separate UVB bulb. The advantage of using a mercury vapor bulb is that you’ll only need to use one bulb, saving space and lowering costs.

A tortoise doesn’t need a heat lamp at night as long as it can stay warm in other ways. If your tortoise gets too cold at night, offer a heat source that doesn’t generate light, such as a ceramic plate or mercury vapor bulb.