Does Red Light Therapy Tan You? Separating Myths from Science

Red light therapy sits in that awkward category of “light on skin,” so people automatically connect it to tanning. The question comes up fast: does red light therapy tan you, or is it basically a safer tanning bed?

It isn’t. A tanning bed is designed to expose skin to ultraviolet radiation. Red light therapy is designed for photobiomodulation, meaning specific wavelengths are used to support cellular signaling in the skin. Different light. Different purpose. Different risks.

This article clears the confusion without the scare tactics.

Why does tanning happen in the first place?

A tan is not just “skin getting darker.” It is the skin reacting to UV exposure.

The FDA puts it plainly: there is no such thing as a safe tan, because the increase in melanin that causes the color change is a sign of skin damage from UV radiation.

UV comes from the sun and from artificial sources like tanning beds and sunlamps. The CDC links UV exposure to skin cell damage and skin cancer risk, and recommends avoiding artificial UV sources like tanning beds.

So if a device does not emit UV, it is not operating in “tanning biology.”

Red light vs UV light

This is the key distinction.

UV light

• The tanning trigger
  

• Associated with DNA damage and higher skin cancer risk
  

• Used intentionally in tanning beds
  

Red light therapy

• Uses visible red and often near-infrared wavelengths

• Aimed at photobiomodulation effects in tissue
  

• Not a UV exposure method

Tanning beds are also not “a little UV.” The American Academy of Dermatology notes tanning bed bulbs emit mostly UVA light.

That is why tanning bed comparisons keep landing in cancer risk conversations, not skincare conversations.

Does red light therapy tan you?

No, not in the true tanning sense.

What can happen sometimes is temporary redness right after a session, especially if:

• the device is very close,
  

• the session is long,
  

• or your skin flushes easily.
  

That flush is not a tan. A tan develops over time after UV exposure because melanin production increases. The FDA notes skin tone can darken over the next 48 hours after UV exposure due to increased melanin.

Red light therapy does not work through that UV-melanin pathway.

Does red light have UV?

Proper red light therapy devices are not designed to emit UV. If the question is “Does red light have UV?” the clean answer is:

• Red light itself is visible light.
  

• UV is a different band of radiation.
  

• UV is what drives tanning.
  

The practical buyer tip: ignore marketing adjectives and look for the actual wavelength ranges listed. If a product is vague about what it emits, skip it.

Red light therapy and melanin: can it darken skin?

This is where people get cautious, especially if they deal with melasma or post-inflammatory hyperpigmentation.

A helpful reference point: a 2023 review on visible light and melanocyte biology notes that 630 nm red light showed no promotion effect on melanogenesis in a study it discussed.

A study discussing PBM parameters also references findings that 630 nm was not found to induce pigmentation in vivo, and notes research suggesting 660 nm may inhibit melanin synthesis in certain contexts.

So the simple expectation for most users is:

• Red light therapy is not a tanning stimulus
  

• It is not expected to “make you darker” the way UV does
  

That said, skin is not a lab sample. Irritation and heat can make pigmentation look worse in some people. That is not “red light tanning.” That is skin reacting to stress. If pigmentation is a concern, the safest approach is calmer sessions and tracking how your skin behaves over a few weeks.

Does near-infrared cause tanning?

Near-infrared is not UV, so it does not trigger tanning biology.

The more relevant issue with near-infrared is heat management. Used too close or too long, it can feel warm. If skin gets irritated, sensitive areas can look more reactive.

So the answer stays the same:

• Near-infrared does not tan you
  

• Overdoing intensity and time could potentially annoy the skin

Red light therapy vs tanning beds

If the goal is darker skin, red light therapy is the wrong tool. If the goal is skin support without UV exposure, that is where red light therapy is usually discussed.

Is red light therapy safe for skin?

For most people, it is considered low-risk when used responsibly, but the details matter. Photobiomodulation is dose-dependent. Too little does nothing. Too much can irritate.

A few simple guardrails keep skin happy:

• Start shorter than you think you need
  

• Increase time slowly
  

• Keep a consistent distance
  

• Do not chase heat
  

If your skin is reactive, treat the first two weeks as testing, not “results season.”

What to do if you’re worried about hyperpigmentation

A quick, sensible approach:

• Keep sessions shorter at first
  

• Avoid very close distances
  

• Do not use it on freshly irritated or over-exfoliated skin
  

• If your skin looks angrier after sessions, pause and reset your routine
  

If you have melasma or stubborn hyperpigmentation, it is worth checking with a dermatologist, because pigmentation has triggers beyond light alone.

FAQ

Does red light therapy make you tan?

No. A tan is driven by UV exposure and melanin production as a response to damage. The FDA states there is no safe tan and explains that UV exposure increases melanin, which darkens skin tone over time. Red light therapy is not a UV exposure method.

Can you get tan from red light therapy?

A true tan is not expected from red light therapy. Some people notice a brief pink or warm look right after a session, which is usually temporary flushing. That is different from a UV-driven tan, which develops gradually after exposure.

Is red light therapy the same as a tanning bed?

No. Tanning beds emit ultraviolet radiation (mostly UVA), which is tied to higher skin cancer risk. Red light therapy devices are not built to deliver UV. They use red and near-infrared light for photobiomodulation, not tanning.

Can red light darken hyperpigmentation?

Red light is not considered a tanning trigger, and research reviews report red wavelengths like 630 nm were not found to promote melanogenesis in the discussed studies. Still, any routine that irritates skin can make pigmentation look more noticeable, so dose and comfort matter.

Is red light therapy safe for daily use?

Many people use it frequently, but daily use should be earned, not assumed. Start with shorter sessions, keep the distance consistent, and watch how your skin responds. If irritation shows up, reduce time or frequency.

Final word

Red light therapy doesn’t tan you. If skin is getting darker, UV is usually the culprit, or the skin is reacting to irritation, not “red light tanning.” The smarter focus is device quality, the value the device provides and how your skin responds over time.

For a routine that’s easy to stick to, choose the format that matches your actual life: a red light therapy mask for face sessions, red light panels for broader coverage, or a targeted red light therapy device when you only want to work on one area at a time.