Red Light Therapy Sauna: What Heat and Light Each Do
A red light therapy sauna is usually an infrared sauna cabin fitted with red and near-infrared LEDs, or a studio that offers a sauna alongside a separate light session. The heat and the light do different jobs, and each has its own research. Below: what "red light sauna" can mean, real cabin temperatures, what each body of evidence shows, how to check sauna LEDs, the order to use them in, safety, and how to add a panel or mask at home.
Key takeaways
- In 2,315 Finnish men followed for a median of 20.7 years, 4 to 7 sauna sessions a week were linked with fewer fatal cardiovascular events than one a week. Laukkanen, 2015
- Infrared sauna cabins run at an air temperature of around 40°C, against 85 to 90°C for traditional saunas. ICNIRP
- In a sham-controlled trial of 76 people, LED light on the face twice a week for 4 weeks reduced wrinkles by up to 36% from baseline. Lee, 2007
- A 2025 meta-analysis found red and near-infrared light on the muscle lowered soreness more than placebo at 72 and 96 hours after exercise. Tsou, 2025
- Dermatologists advise eye protection every time you use red light therapy, and sunglasses are not a substitute. AAD, 2024
What is a red light therapy sauna?
It is usually one of three things: an infrared cabin with added red and near-infrared LEDs, a studio offering a sauna and a light session side by side, or a sauna with coloured mood lighting. In all three, the heat comes from the heaters, not from the LEDs.
ICNIRP notes that the wall heaters and rods in most cabins give off almost only far infrared. ICNIRP Far infrared is felt mainly as heat, as our guide to far infrared vs near infrared explains.
| Traditional sauna | Infrared cabin | Red light panel | |
|---|---|---|---|
| Delivers | Hot, dry air | Far-infrared heat | Visible red and near-infrared light |
| Temperature | 80 to 100°C at head level | Around 40°C air | Kivorla panel surface at or below 40°C |
| Feels like | Heavy sweating | Sweating at lower air temperature | Mild warmth, no sweating |
| Studies measured | Heart and blood vessel health | Blood pressure, heart failure, recovery | Skin quality, muscle performance, soreness |
| Typical session | 5 to 20 minutes per stay | 15 to 30 minutes in trials | 10 to 15 minutes per area |
For a fuller comparison, see red light therapy vs infrared sauna.
How hot is an infrared sauna compared with a traditional sauna?
Much cooler in the air: infrared cabins run at around 40°C, against 85 to 90°C for traditional saunas, according to ICNIRP.
Mayo Clinic explains: "An infrared sauna heats your body directly without warming the air around you." Mayo Clinic, 2024
A Finnish sauna reaches 80 to 100°C at head level, with humidity of about 10 to 20%. Laukkanen, 2018 Cleveland Clinic gives 43 to 57°C for infrared and 66 to 91°C for traditional saunas. For beginners, it suggests about 43°C for 5 to 10 minutes, and roughly 20 to 30 minutes at most even with experience. Cleveland Clinic, 2026
What does the research on regular sauna use show?
The largest studies come from Finnish men using hot traditional saunas, where frequent bathing was linked with fewer fatal heart events over about 20 years. These are associations, and smaller infrared trials point to possible benefits for blood pressure and heart failure.
The 2015 cohort followed 2,315 men aged 42 to 60, whose average sauna was 78.9°C for 14.2 minutes. Laukkanen, 2015 Compared with one session a week, 4 to 7 sessions were linked with:
- Sudden cardiac death: a hazard ratio of 0.37.
- Fatal cardiovascular disease: a hazard ratio of 0.50, about half the rate.
- Death from any cause: a hazard ratio of 0.60.
A systematic review gathered 40 clinical studies with 3,855 participants, 13 of them randomised trials. Hussain and Cohen, 2018 It concluded that "regular dry sauna bathing has potential health benefits".
For far-infrared saunas, a review of 9 papers found "limited moderate evidence" for blood pressure and heart failure. Beever, 2009 In one trial of 28 people, systolic pressure fell from 125 to 110 mm Hg.
All of this is research on heat, and none of it involved LEDs.
What do red and near-infrared light do for skin and muscles?
Light trials shine set wavelengths onto the skin at a set distance and schedule, and they measure skin quality, muscle performance and soreness. Heat plays no part in these results.
In a sham-controlled, split-face trial, 76 people with facial wrinkles had LED light at 633 nm, 830 nm or both, twice a week for 4 weeks. Lee, 2007 Wrinkles fell by up to 36% from baseline. Elasticity rose by up to 19%.
A larger 2014 controlled trial of red light beds is covered in our red light therapy bed guide.
For muscles, a 2018 review pooled 39 randomised trials with 861 participants, using 655 to 950 nm on the skin over the muscle. Vanin, 2018 Time to exhaustion, repetitions and peak torque favoured light, in mostly small trials.
Is the red light in a sauna cabin real red light therapy or chromotherapy?
It depends on what the maker publishes: light therapy is defined by wavelength in nanometres and irradiance at a stated distance, while chromotherapy is defined by the colour you see. If neither figure is given, treat the red light as ambient lighting.
Our chromotherapy article covers colour lighting in detail. To judge LEDs in a cabin or studio, ask for:
- Peak wavelengths: in nm, such as the 633 and 830 nm of the skin trial.
- Irradiance: in mW/cm2 at a stated distance.
- Distance and time: how far your skin sits from the LEDs, and for how many minutes they run.
Lighting without these figures still makes a pleasant cabin, but it is mood lighting.
Does a red light sauna help muscle recovery after a workout?
Each part has some support of its own: an infrared sauna trial found slightly better jump recovery after endurance exercise, and light on the muscle lowered soreness in a 2025 meta-analysis. The two results come from different studies with different measures.
In the sauna trial, 10 active men sat in an infrared cabin at 35 to 50°C for 30 minutes straight after exercise. Mero, 2015 After the endurance session, jump height was 0.34 m with the sauna, against 0.32 m without. Strength recovery did not differ.
The light meta-analysis gathered 14 controlled studies using 660 to 950 nm on the muscle. Tsou, 2025 Soreness was lower than with placebo at 72 and 96 hours. The authors concluded light "may serve as an effective intervention" for delayed soreness.
For timing, see red light therapy before or after a workout. One arrangement fits both habits: the panel before a workout, the sauna after.
What settings did the sauna and light studies use?
Sauna studies set a temperature and a number of minutes, while light studies set wavelengths and a weekly schedule on the skin. The table lists both, all used from outside the body.
| Study | Heat or light | Temperature or wavelength | Minutes | How often | Length |
|---|---|---|---|---|---|
| Laukkanen, 2015 | Heat, Finnish sauna | Average 78.9°C | Average 14.2 | 1 to 7 a week | 20.7 years of follow-up |
| Beever, 2009 | Heat, far-infrared sauna | About 60°C | 15 | Daily, or 10 sessions in 2 weeks | 2 to 4 weeks |
| Mero, 2015 | Heat, infrared sauna | 35 to 50°C | 30 | After exercise | Single sessions |
| Lee, 2007 | Light, LED on the face | 633 nm, 830 nm or both | Not in the abstract | 2 a week | 4 weeks |
| Vanin, 2018 | Light on muscle | 655 to 950 nm | Varied | Mostly single sessions | Varied |
| Tsou, 2025 | Light on muscle | 660 to 950 nm | 10 seconds to 12 minutes per point | After exercise | Short courses |
The light rows describe research devices, not panel settings. To stay near the studied range at home, dim each wavelength (from 1 to 100%), set a shorter timer (from 1 minute), or step back from 6 to 12 inches.
Should you do red light therapy before or after a sauna?
Use them at separate times, with the light session on cool, dry skin. The simplest options are different days, light first and the sauna later, or light after the sauna once you have showered, dried off and cooled down.
No study has tested sauna heat and red light in the same session, so each keeps its own evidence. After a sauna, Cleveland Clinic advises a shower to cool down and water or an electrolyte drink. Cleveland Clinic, 2026
If your skin feels hot or stays red during a light session, step back, dim the channels or shorten the timer. ICNIRP advises stopping and seeking advice if reddening lasts more than a day. ICNIRP
After an evening sauna, dim the panel's 480 nm channel to 1% or switch it off and finish about two hours before bed. With the mask, choose the red mode rather than the blue mode in the evening.
Can you put a red light panel inside a sauna?
Not a Kivorla panel or mask: both are electrical light devices, and they belong outside the cabin, away from heat, steam and water. LEDs built into a sauna are designed for the cabin, which makes them a different kind of product.
The panel runs from a mains cord and the mask from a rechargeable battery. Never use either while overheated, sweaty or wet, and do not drape a towel over the panel while it runs.
Is a sauna safe with a heart condition, in pregnancy or after drinking?
Ask a doctor first if you have a heart condition or high blood pressure, ask your midwife or doctor if you are pregnant, and skip the sauna when ill or after drinking. Leave at once if you feel dizzy or sick.
- Heart: unstable angina, a recent heart attack, uncontrolled high blood pressure, decompensated heart failure and severe aortic stenosis rule a sauna out. Laukkanen, 2018
- Overheating risk: people with cardiovascular disease or obesity should seek medical advice before using infrared cabins. ICNIRP
- Pregnancy: a raised core temperature in early pregnancy is linked with neural tube defects; guidance limits sauna use to 15 minutes. HealthLink BC, 2023
- Alcohol: about 40% of sauna burns in one series happened under the influence of alcohol. Laukkanen, 2018
- Other cautions: multiple sclerosis, trying to conceive (heat may lower sperm count for a while) and illness. Cleveland Clinic, 2026
The NHS lists dizziness, headache, nausea, heavy sweating, cramps and intense thirst as signs of heat exhaustion. NHS Move somewhere cool, drink water and cool the skin. Call 999 if there is no improvement after 30 minutes.
Who should not use a red light panel or mask, and what about the eyes?
Our precautions rule out both devices in pregnancy, with epilepsy, with a thyroid condition or thyroid medication, with photosensitising medication, and over broken skin or an open wound. Protect your eyes every session.
The panel manual adds:
- Pregnancy: not while breastfeeding or preparing for pregnancy either; see red light therapy while pregnant.
- Seizures: not with seizures triggered by light.
- Skin: not after sunburn on the body in the past 2 weeks, and not for Fitzpatrick skin types V or VI.
- Sleep: not for use while asleep or by anyone unconscious.
If you take any medicine, check with your pharmacist or doctor first, because our precautions rule out photosensitising medication.
The American Academy of Dermatology advises eye protection "every time". AAD, 2024 The panel ships with goggles: wear them, keep your eyes closed, and turn side-on near the neck rather than facing it. The mask has an eye opening with no diodes over the eyes; keep your eyes closed and do not stare into the light.
How do you fit a Kivorla panel or mask around a sauna habit?
Use the panel for body areas and the mask for the face, at a separate time from the sauna, on clean, dry, cooled skin. Neither device is a heater or a sauna, so they add light to your week, not heat.
The 9-Spectrum Red Light Therapy Panel carries 480, 590, 630, 660, 670, 810, 830, 850 and 1060 nm, each dimmable from 1 to 100%. Several of its red and near-infrared channels sit within the ranges used in the trials above.
- Position: hang it on a door or wall with the included door hook, pulley, hanging cables and screws, or stand it upright on the floor (a floor stand is sold separately by the maker).
- Distance: about 6 inches for a joint, about 12 inches for the back or thighs.
- Timer: 10 to 15 minutes per area, set on the controller; if no time is set, it stops at 5 minutes.
- Spacing: at least 6 hours between 30-minute sessions.
The cordless 4-Wavelength Red Light Therapy Mask is a full-face silicone shell with an eye opening. Its red mode combines 665 nm red with 850 and 1064 nm near-infrared, the mode for skin quality goals. Set it on the handheld controller or by voice. The manual allows 10-minute sessions up to 4 times a week at high brightness, or 15-minute sessions up to 3 times a week, and never more than 20 minutes a day. After a sauna, wash, dry and cool your face first.
A sample week: sauna on Monday, Wednesday and Friday evenings, the panel on your back or legs on Tuesday and Thursday mornings, and the mask on 3 or 4 days at times away from the sauna.
Before you buy, read the precautions. Standard shipping to the US, UK and Germany is free. Under our return and refund policy, returns are accepted within 30 days: an unopened device with its seals intact is refunded less a 10% restocking fee, and an opened device that is undamaged and complete is refunded less 20%.
Kivorla devices are general wellness devices, not medical devices, and they are not saunas or heaters: never use them inside a sauna cabin. Speak to a doctor before using a sauna if you have a heart condition or high blood pressure, and to your midwife or doctor if you are pregnant.