A red light tanning bed doesn’t tan your skin at all. Unlike traditional tanning beds that use ultraviolet (UV) rays to darken skin, red light beds emit low-energy wavelengths (typically 630 to 660 nanometers) that penetrate the skin without triggering melanin production or causing UV damage. Their purpose is skin rejuvenation: boosting collagen, reducing inflammation, and improving skin texture over time. The name “red light tanning bed” comes from the fact that these devices look nearly identical to tanning beds and are often found in the same salons, but they work in a fundamentally different way.
How Red Light Works Inside Your Cells
Red light therapy, formally called photobiomodulation, targets a specific structure inside your cells: the mitochondria. Mitochondria are the parts of each cell responsible for producing energy. More specifically, red light is absorbed by an enzyme called cytochrome c oxidase, which plays a central role in converting oxygen and nutrients into usable cellular fuel (ATP).
Here’s what happens. Under normal conditions, a molecule called nitric oxide can latch onto this enzyme and slow it down, like a governor on an engine. When red light hits the enzyme, it knocks nitric oxide loose, allowing the enzyme to run at full speed again. The result is a burst of energy production inside the cell, along with signaling molecules that trigger repair and growth processes. This is why red light therapy is used for everything from skin rejuvenation to wound healing: it essentially gives your cells more energy to do their jobs.
Red Light Beds vs. UV Tanning Beds
The distinction between these two machines matters enormously for your skin health. A UV tanning bed emits ultraviolet radiation that penetrates your skin and damages DNA in skin cells, which triggers melanin production as a protective response. That’s the “tan.” Over time, this DNA damage accumulates. Starting tanning bed use before age 35 increases the risk of melanoma by 75 percent, and repeated UV exposure accelerates skin aging through collagen breakdown, wrinkles, and sunspots.
Red light beds produce no UV radiation. They cannot tan your skin, and they don’t damage DNA. Instead of breaking down collagen, the evidence suggests they help build it. A controlled trial published in Photomedicine and Laser Surgery found that after 30 sessions of red light therapy, 69 percent of participants showed measurable improvement in wrinkles as assessed by blinded evaluators, compared to just 4 percent of untreated controls. Both groups treated with red light also showed increases in collagen density scores, while the control group saw a slight decline.
Skin Benefits You Can Expect
The most well-supported benefit of red light beds is increased collagen production. Collagen is the protein that keeps skin firm and smooth, and your body produces less of it with age. By energizing the cells responsible for collagen synthesis, red light therapy can improve skin firmness, reduce fine lines, and smooth overall texture.
Red light also has a strong anti-inflammatory effect. In activated inflammatory cells, red light exposure reduces the production of key inflammation drivers, including compounds that cause redness, swelling, and tissue breakdown. This makes it potentially useful for acne, rosacea, and post-procedure healing. Research on wound models has shown faster healing times and decreased expression of major inflammatory proteins like TNF-alpha, a central player in chronic skin inflammation. The anti-inflammatory effect is one of the most consistently reproduced findings in the research literature.
Some users also report improvements in skin tone and a general “glow,” though this likely reflects better circulation and reduced inflammation rather than any pigment change.
Hybrid Beds That Combine Both
Some salons now offer hybrid tanning beds that deliver UV light and red light simultaneously. These beds are designed to give you a traditional tan while also providing the skin-rejuvenation benefits of red light therapy. The red light component doesn’t reduce the UV tanning power, so the UV-related risks (skin damage, aging, cancer risk) still apply. If you’re using a hybrid bed, you’re getting two very different treatments at once, and the UV portion carries the same concerns as any tanning bed. Don’t assume the red light “cancels out” the UV damage.
What a Typical Session Looks Like
A red light therapy session in a full-body bed usually lasts 10 to 20 minutes. If you’re new to it, starting with shorter sessions of 5 to 10 minutes a few times per week is standard practice, then adjusting based on how your skin responds. The experience itself is unremarkable: you lie in a bed that looks like a tanning bed, surrounded by panels emitting a warm red glow. There’s no heat comparable to UV beds, no burning sensation, and no need for tanning lotion.
Most people begin to notice visible changes in skin tone, texture, and firmness after three to four weeks of consistent use. This timeline makes sense given that collagen remodeling is a gradual biological process, not an overnight change. Results tend to build with continued sessions, and the improvements typically require ongoing maintenance to sustain.
Safety and Eye Protection
Red light therapy has a favorable safety profile with no documented side effects when used as directed. A review of the research found no evidence of ocular damage from light therapy, with one exception: a single case involving a person taking a photosensitizing medication (a type of antidepressant) who developed an eye condition. Most salons provide protective goggles, and wearing them is a reasonable precaution even though the risk appears low. The light is intense and staring into it is uncomfortable regardless of safety data.
People taking medications that increase light sensitivity, or those with preexisting eye conditions, should be more cautious. The long-term ocular safety for these specific groups hasn’t been thoroughly studied yet.