Blue Light vs. Red Light Therapy: Benefits and How Often to Use Them

A home sauna can make it easier to set aside time for yourself. When it also includes blue and red lights, it helps to understand what each light is intended to do—and how to use it appropriately.

Blue light therapy is mainly studied for inflammatory acne. Red light therapy is studied for skin appearance, including fine lines, texture, and collagen support. Neither has a universal daily treatment time: the right schedule depends on the specific device and its instructions. Cleveland Clinic.

What are the benefits of blue light therapy?

Blue light treatment may help reduce acne-related bacteria on the skin. That makes certain blue-light devices an option for people with inflammatory breakouts, such as red pimples. Cleveland Clinic.

The most useful way to think about blue light is as a possible addition to an acne-care routine. The American Academy of Dermatology explains that light treatments can reduce acne, but usually do not clear it completely on their own. Results vary, and multiple treatments are generally needed. Deep, painful cysts and nodules need a different treatment approach. AAD: Light treatments for acne.

Does that mean any blue sauna light treats acne? No. A colored glow alone does not establish a therapeutic effect. Research findings apply to the equipment and treatment settings tested.

A 2025 review of home-use LED acne devices found promising results, while warning that differences in light output and treatment protocols limit how widely the findings can be applied. A sauna’s blue-light feature should therefore be assessed using its own specifications and evidence. JAMA Dermatology.

What are the benefits of red light therapy?

Red light therapy, often discussed under the term photobiomodulation, uses specific light wavelengths to influence cellular activity. Researchers are investigating how it may support collagen production and reduce inflammation. Collagen is a structural protein that helps give skin strength and firmness. Cleveland Clinic.

Potential skin benefits include:

• Smoother texture: improvements in rough-feeling skin.

• Softer-looking fine lines: gradual changes in the appearance of wrinkles.

• Collagen support: increased collagen density in some controlled research.

A controlled study involving 136 volunteers found improvements in skin roughness, complexion, and collagen density with the tested red-light and broader-spectrum treatments. These results support further interest in light therapy, but do not prove that every red-light device performs the same way. Wunsch and Matuschka, 2014.

Expect gradual changes rather than an immediate transformation. The American Academy of Dermatology notes that home-device results vary and that the best treatment schedules remain an active research question. AAD: Red light therapy for skin.

Blue light vs. red light: a quick comparison

Question	Blue light	Red light
Main skin-care focus	Inflammatory acne	Skin texture and signs of aging
Potential benefit	Fewer inflammatory blemishes with suitable treatment devices	Improvements in fine lines, texture, and collagen density with suitable treatment devices
Does everyone see results?	No; results depend on the person and treatment	No; results depend on the person and treatment
How long should each session last?	Follow the specific device’s instructions	Follow the specific device’s instructions

This comparison summarizes the research above; it is not a claim that every sauna light delivers these outcomes.

How long should you use blue or red light each day?

There is no single daily minute count that is appropriate for every blue- or red-light device. Daily use is not always necessary.

Session length depends on the light’s output, wavelength, distance from the skin, treatment area, and intended use. A schedule for a close-fitting facial mask cannot automatically be transferred to a sauna-mounted light.

Published research illustrates this variation:

Research example	Schedule studied
A trial of 415 nm blue light and combined 415/660 nm blue-red light for acne	15 minutes daily for 12 weeks
A controlled study of red-light and broader-spectrum treatments for skin appearance	Twice weekly, with evaluation after 30 sessions

These are research examples, not Wizzisauna usage instructions. They show why a universal “use both colors for 20 minutes every day” rule would be misleading. Acne phototherapy trial, skin appearance trial.

For your Wizzisauna, follow the model-specific light-therapy schedule, including session length, frequency, distance, and eye protection. If those details are missing, contact Wizzisauna before choosing a treatment time.

Is sauna time the same as light-therapy time?

No. Wizzisauna’s general FAQ suggests that beginners start with 15–20 minutes of sauna use at a lower temperature. That guidance concerns heat exposure; it does not establish how long to use blue or red light. Wizzisauna FAQ.

Check the instructions for both features. Do not extend a sauna session to complete a light-treatment schedule.

How to build a comfortable routine

1. Read your model’s instructions. Check the settings and schedule for the light feature you plan to use.

2. Use the specified eye protection. If protective goggles are required, sunglasses are not a substitute.

3. Ask about light sensitivity. Consult a dermatologist if you take photosensitizing medication, have a light-sensitive condition, or are concerned about pigmentation changes.

4. Respect heat tolerance. Stay hydrated and leave the sauna if you feel dizzy, lightheaded, or unwell.

These precautions follow AAD guidance for home light devices and Wizzisauna’s sauna-use guidance.

Frequently asked questions

Can you use blue and red light together?

Some acne devices combine them, and research suggests that combination treatment can help. Use a combined setting only as directed for your particular device. JAMA Dermatology review.

Is red light better than blue light?

It depends on your goal. Blue light is generally discussed for inflammatory blemishes; red light is more often discussed for skin appearance and collagen support. The device and its evidence matter as much as the color.

Will longer sessions give faster results?

Do not assume so. Exceeding a device’s instructions can increase the risk of skin or eye injury. Follow the prescribed schedule instead of adding extra time. Cleveland Clinic: Red light safety.

What do 455 nm and 658 nm mean?

They describe light wavelengths, measured in nanometers: 455 nm is blue and 658 nm is red. A wavelength specification does not tell you the treatment dose or recommended session length.

Find a routine that fits your Wizzisauna

Explore Wizzisauna’s home saunas and compare the light features available on your preferred model. Before your first session, confirm the operating instructions so you can build a routine around your equipment, comfort, and goals.

This article provides general education and does not replace personalized medical advice.