Guide · LED light therapy
Red light therapy in Singapore what LED can do for skin, and what it cannot
Red, near-infrared and blue LED are sold for everything from wrinkles to acne. Here is what the evidence supports, how home devices compare with in-clinic sessions, and where light fits into a sensible skin plan.
Quick answer
- Red light therapy uses low-level red and near-infrared light to act on skin cells without heating or burning them, a process called photobiomodulation. Small trials suggest a modest improvement in fine lines, skin texture and healing over many sessions, but study sizes are small and settings vary widely.
- Blue light is used for acne because it acts on acne bacteria, but a Cochrane review found that high-quality evidence for light therapies in acne is lacking. Painful, widespread or scarring acne should be assessed by a doctor first.
- Home LED masks are less powerful than in-clinic devices and need regular, ongoing use. They appear safe in the short term if you follow the directions and wear any goggles supplied; people with light-sensitive conditions or on medicines that increase light sensitivity should check with a doctor first.
- At SkinRev Lab, LED is part of the HydraFacial Syndeo Deluxe (S$388) and Platinum (S$438) tiers and the Rejuran Korea Professional facial (S$298), all before GST. SKIN Eternity Pod (S$288, first session S$68) uses far-infrared warmth for recovery, not red LED.
The basics
What red light therapy actually is
Red light therapy, also called LED light therapy or low-level light therapy, shines red or near-infrared light on the skin at low power. The light is absorbed by structures in skin cells, mainly in the mitochondria, which is thought to change how the cells produce energy and signal repair. The medical term for this is photobiomodulation. It does not cut, burn or resurface the skin, and there is no downtime.
It is different from treatments with similar names. It is not ultraviolet phototherapy, which dermatologists use for conditions such as psoriasis and eczema. It is not intense pulsed light or a resurfacing laser, which use heat to target pigment, vessels or the skin surface. And it is not an infrared sauna, which warms the body with radiant heat rather than acting on skin cells with specific wavelengths of light.
Colours of light
Red, near-infrared and blue light compared
Each colour of light reaches a different depth and is used for different things. Exact wavelengths vary between devices, and the strength of the evidence varies more than marketing suggests.
| Light | Typical wavelength | Mainly used for | What the evidence shows |
|---|---|---|---|
| Blue | Around 405 to 420 nm | Mild to moderate acne | Some benefit in small trials; overall certainty low |
| Red | Around 630 to 660 nm | Fine lines, texture, redness after procedures, healing | Modest improvement in small controlled trials |
| Near-infrared | Around 800 to 850 nm, invisible | Usually combined with red for skin and healing | Small trials, often mixed with red light |
| Red and blue together | Both bands | Acne | Small trials; light is an add-on, not a replacement for acne treatment |
| Far-infrared warmth | Longer infrared wavelengths, felt as heat | Saunas, warmth and relaxation | Different mechanism; not an LED skin treatment |
Evidence: ageing skin
What red light can do for fine lines and texture
The best-known controlled trial treated 113 volunteers twice a week for 30 sessions with red or broader-spectrum light and compared them with 23 untreated controls. The treated groups had better skin feel, less roughness and higher collagen density on ultrasound, and blinded photo assessment favoured treatment. Adding a broader spectrum gave no advantage over red light alone.
A systematic review of 31 randomised trials of LEDs in dermatology gave a grade B recommendation for acne, cold sores and shingles, and acute wound healing, and lower grades for most other uses, noting small sample sizes, missing blinding and varied settings. The American Academy of Dermatology describes results for ageing skin as subtle to noticeable and says more research is needed on how long and how often to treat.
In practice, red light suits people who want a gentle, no-downtime add-on. It will not lift sagging skin, fill volume loss or fade melasma; those need other treatments.
Evidence: acne
Blue light for acne, and when to see a doctor instead
Acne bacteria produce compounds called porphyrins that absorb blue light, which is the reason blue light is used for spots. A Cochrane review of 71 studies with 4,211 participants found that most studies were small and very different from each other, and concluded that high-quality evidence for light therapies in acne is lacking.
So light works best as support alongside proven acne care, not instead of it. See a doctor if acne is painful, deep, scarring, spreading to the chest or back, or not improving after a few months of good home care. Prescription treatment works on the causes of acne in a way light cannot.
Doctor-led acne and acne-scar treatments are available from Dr Sin Yong at IN Eternity Clinic, priced at consultation by the clinic.
Home or clinic
Home LED masks vs in-clinic light
- Power: in-clinic devices are more powerful than devices sold for home use, so home masks need regular use over months, and results stop if you stop.
- Claims: a device cleared by a regulator is considered low risk; that is not the same as proof that it works.
- Eyes: if the instructions say to wear goggles, wear them every time. Sunglasses are not a substitute.
- Skin tone: people with darker skin may be more prone to pigment changes; check with a doctor first.
- Medical conditions: lupus and other light-sensitive conditions can flare, and some medicines increase light sensitivity. Ask your doctor or pharmacist before starting.
- Cost: compare the price of a mask with what you want from it. If your concern is sagging, scarring or pigmentation, the money may be better spent on a treatment that targets it.
At SkinRev Lab
Where LED is used at SkinRev Lab
At SkinRev Lab, our non-invasive aesthetic centre at CityLink Mall, LED is a supporting step within two facials rather than a separate session. HydraFacial Syndeo Deluxe (S$388 before GST) adds a booster chosen for your concern plus LED support to the core cleanse, extract and hydrate steps. Platinum (S$438) includes the booster and LED and adds further steps.
The Rejuran Korea Professional facial (75 minutes, S$298 before GST) is either a hydrating facial with galvanic and LED, or a needle-free c-PDRN infusion with a skin booster and LED. Your Aesthetic Specialist suggests which suits your skin at assessment.
Infrared warmth
SKIN Eternity Pod: infrared warmth, not red LED
People searching for red light therapy are sometimes looking for a recovery or relaxation session rather than a skin treatment. SKIN Eternity Pod at SkinRev Lab pairs warm mineral salt-pack acupressure with far-infrared warmth while you rest fully clothed for 30 to 45 minutes. It is used for post-exercise recovery, circulation support and relaxation.
It is not red light or LED therapy, and it is not a fat-reduction or skin-tightening treatment. A session is S$288 before GST, with a first session at S$68.
Hair
Red light for thinning hair
Low-level red light is also used for pattern hair thinning. The American Academy of Dermatology notes that some trials found regrowth in hereditary hair loss, but that home devices will not restore a full head of hair. Light can only support follicles that are still alive; a smooth, bald area will not respond.
At IN Eternity Clinic, H2LT laser uses low-level red laser light as one part of a doctor-led hair plan, after Dr Sin Yong has worked out the cause of the thinning. It is priced at consultation by the clinic.
Sources
References & sources
- American Academy of Dermatology. Is red light therapy right for your skin? Updated 13 September 2024.
- Jagdeo J, Austin E, Mamalis A, et al. Light-emitting diodes in dermatology: a systematic review of randomized controlled trials. Lasers Surg Med. 2018;50(6):613-628.
- Wunsch A, Matuschka K. A controlled trial to determine the efficacy of red and near-infrared light treatment in patient satisfaction, reduction of fine lines, wrinkles, skin roughness, and intradermal collagen density increase. Photomed Laser Surg. 2014;32(2):93-100.
- Barbaric J, Abbott R, Posadzki P, et al. Light therapies for acne. Cochrane Database Syst Rev. 2016;9:CD007917.
- Avci P, Gupta A, Sadasivam M, et al. Low-level laser (light) therapy (LLLT) in skin: stimulating, healing, restoring. Semin Cutan Med Surg. 2013;32(1):41-52.
Common questions
Your questions,
answered
Does red light therapy work for skin?
Small controlled trials show modest improvements in fine lines, roughness and skin feel after many sessions. Results are subtle to noticeable rather than dramatic, and they need ongoing use. It will not lift sagging skin or fade melasma.
Is red light therapy good for acne?
Blue light, sometimes with red, is used for acne, but a Cochrane review found high-quality evidence is lacking. It is best used alongside proven acne treatment. See a doctor for painful, widespread or scarring acne.
Are LED face masks worth it?
They are weaker than in-clinic devices and need regular use for months, with results fading if you stop. They suit people who want a gentle add-on and are happy with subtle change. If your main concern is sagging, scars or pigment, a targeted treatment is usually better value.
Is red light therapy safe for the eyes?
Follow the device directions, and wear the goggles supplied if they are required, every time. Sunglasses are not a substitute. Do not look directly into the light.
How often should I do red light therapy?
Follow the device or clinic's instructions. In one controlled trial, people were treated twice a week for 30 sessions. Improvement builds slowly and fades if treatment stops.
Is SKIN Eternity Pod a red light therapy?
No. SKIN Eternity Pod pairs warm salt-pack acupressure with far-infrared warmth for recovery and relaxation. It is S$288 per 30 to 45-minute session before GST, with a first session at S$68.
Does red light therapy help hair loss?
Low-level red light can support thinning hair where follicles are still alive, and some trials found regrowth in hereditary hair loss. It does not restore hair in bald areas. A doctor should check the cause of hair loss first.
Who should avoid red light therapy?
People with lupus or other light-sensitive conditions, and anyone on medicines that increase light sensitivity, should ask a doctor first. People with darker skin tones may be more prone to pigment changes. Check with your doctor if you are pregnant or have a skin condition.