Red Light Therapy vs Infrared Sauna
The word infrared is what causes the confusion here, because these are two different tools that happen to share it. An infrared sauna heats you. It is a warm room, and whatever people get from it comes from being hot for a while. A red light panel does not heat you to any meaningful degree; it shines particular red and near-infrared wavelengths onto skin and muscle at a dose the trials used, and the effects come from the light. If a sweat and a warm-up is what you are after, buy a sauna. If you want a measured dose of light on your skin or a sore muscle, that is a panel. There is nothing wrong with owning both.
What is the difference between red light therapy and an infrared sauna?
Heat versus light. A sauna raises your body temperature, while a panel delivers red and near-infrared light without warming you up, and with a panel the light is the point.
An infrared sauna uses infrared heaters, whose energy you feel as warmth, to heat your body. A red light panel uses red light, which you can see, and near-infrared light in the 800 to 1060 nm range, which you cannot. In the light trials the working mechanism was light being absorbed by cells, and skin temperature had nothing to do with it. The Kivorla panel's surface stays at or below 40°C in use, according to its specification, and the output reaching you at six inches is measured in watts per square metre, not degrees. You do not sweat in front of it.
What does an infrared sauna do?
It makes you hot. Your heart rate rises, you sweat, and the reported benefits are those of regular heat exposure. The evidence looks promising but comes mostly from small studies.
The best overview we know of covers dry saunas in general rather than infrared ones specifically. A 2018 systematic review in Evidence-Based Complementary and Alternative Medicine gathered 40 clinical studies of regular dry sauna bathing, 3,855 participants in all. Most reported beneficial effects. Only 13 of the 40 were randomised controlled trials, though, and most of the studies were small, under 40 people. The authors concluded that sauna bathing has potential benefits, that more data on side effects is needed, and that the best frequency and duration remain unknown. Study summary. We do not sell saunas and have no motive to run them down, and that review seems a fair summary: people enjoy it, it probably does them some good, and the science is thinner than the marketing.
What does a red light panel do?
It delivers a dose of specific wavelengths to skin and muscle. On skin the trials measured collagen and fine lines; in muscle they measured soreness and performance.
For skin, the 2014 controlled trial of 113 volunteers found smoother skin and higher collagen density after 30 sessions of red or near-infrared light. Full paper. For muscle, a 2018 review of 39 trials with 861 participants found that light between 655 and 950 nm improved time to exhaustion and the number of repetitions, while rating the quality of evidence as very low to moderate. Study summary. A 2025 review of post-training soreness found less of it at 72 and 96 hours. Study summary. Heat played no part in any of those studies. The researchers describe the mechanism as cells absorbing light. Which wavelength does what.
Red light therapy vs infrared sauna: side by side
A sauna is a room and a heat session. A panel is a light source and a targeted session. The practical differences are in the table.
| Infrared sauna | Red light panel | |
|---|---|---|
| What it does | Heats the body | Delivers red and near-infrared light |
| What you feel | Hot, sweating | Mild warmth on the skin, no sweat |
| What the trials measured | A mix of health measures, mostly in small studies | Skin collagen and lines; muscle soreness and performance |
| Targeting | Whole body, always | One area per session, at a set distance |
| Session | Set by the sauna maker | 10 to 15 minutes per area |
| Space | A cabin or a blanket | A 640 by 230 mm panel on a wall, a door or a stand |
| Eyes | Per the sauna maker | Goggles every session |
| Who should avoid it | Follow the sauna maker's guidance and ask a doctor if you have a heart or blood pressure condition or are pregnant | Pregnancy, photosensitising medication, light-triggered seizures, Fitzpatrick skin type V or VI, recent sunburn |
Which should you choose?
Buy for the effect you want. Heat and a sweat means a sauna. A measured dose of light on skin or a sore muscle means a panel. Both, if you have the room for them.
- You want to relax, warm up and sweat. Sauna. A panel will not give you that.
- You want to work on skin texture, fine lines, or the muscles you trained. Panel. That is what the light trials measured.
- You are short of space. Panel. It hangs on a wall or a door with the hardware in the box, and a floor stand is sold separately.
- You struggle with heat, or a doctor has told you to avoid it. Panel, subject to our own precautions.
- You already own a sauna. A panel adds something the sauna does not do rather than repeating it.
Can you use both?
Yes. Since they do different things there is no overlap to manage. Run the panel session on dry, cooled skin, and never inside the sauna.
Different days is the easiest arrangement, or the panel before a workout and the sauna after it. The panel is an electrical device with a mains cord, and our precautions say to keep it away from water and heat sources, so the sauna cabin is out.
What does the Kivorla panel give you that a sauna does not?
Control over the wavelength and the dose, a session you can aim at one area, and a device that fits in the corner of a room.
The panel runs nine wavelengths from 480 to 1060 nm, and each one has its own dimmer, so you can bring up the near-infrared channels for muscle and turn the others down. No heat cabin offers anything like that. Its irradiance is published at six inches, at least 1567 W/m² across the spectrum, so the dose is a figure you can set against the trials rather than a temperature on a dial. The surface stays at or below 40°C, so you can sit close and heat will not be what limits you. The timer runs from 1 to 30 minutes and stops after 5 if you forget to set it, so every session is the same length. Physically it measures 640 by 230 mm and weighs 6.3 kg, and it goes on a wall, a door or a separately bought stand. No cabin, no plumbing, no room given over to it.
Sauna means heat and panel means light, and the evidence for the two looks different: many small, mostly positive sauna studies with the best dose still unknown, against controlled trials on skin collagen and on muscle soreness and performance for light. The 9-Spectrum Red Light Therapy Panel page has its wavelengths, irradiance and controls. Before ordering, know that a return is accepted within 30 days, less a 10% restocking fee if the panel is unopened with its seals intact, or 20% if it is opened but undamaged and complete. Standard shipping is free to the US, UK and Germany. If you are still not sure a panel belongs in your home at all, start with are red light therapy panels worth it.
Kivorla devices are general wellness devices, not medical devices. If you have a medical condition, speak to a qualified healthcare professional before using a sauna or a light therapy device.