Published 30 October 2026 · Reviewed by Dr Sin Yong
IPL hair removal uses a filtered flash lamp that emits a broad band of light at once, while laser hair removal uses a single wavelength chosen for the hair and the skin. Both heat melanin in the follicle. The difference matters most in Fitzpatrick III to V skin, common in Singapore, where a matched wavelength leaves a wider margin between heating the hair and heating the skin.
Short answerIPL is not a laser. On lighter skin with dark hair, both can reduce regrowth; as skin tone rises, reviews point to the long-pulsed 1064 nm Nd:YAG laser. Hair removal here runs on a laser platform carrying 755 nm alexandrite and 1064 nm Nd:YAG, set area by area by Dr Sin Yong.
A filtered flash lamp emitting many wavelengths at once, typically 500 to 1200 nm; it is not a laser
Laser
One wavelength per pulse; hair removal lasers are diode (usually 808 or 810 nm), alexandrite (755 nm) and Nd:YAG (1064 nm)
Skin type
Epidermal melanin absorbs part of a broad band, so the safety margin narrows as skin tone rises; reviews favour long-pulsed 1064 nm Nd:YAG in Fitzpatrick IV to VI
Evidence
Comparative trials are small and of mixed quality; head-to-head studies have tended to favour single-wavelength lasers on hair counts, with IPL also reducing hair
Neither suits
White, grey, red and fine blonde hair carry too little melanin for any light-based device; electrolysis is the alternative and is not offered here
Here
Laser hair removal on the R2 Glow platform, long-pulsed 755 nm alexandrite and 1064 nm Nd:YAG, with settings chosen area by area by Dr Sin Yong
IPL vs laser hair removal: what is the difference?
The difference is the light. Intense pulsed light comes from a flash lamp that emits a broad spectrum. A filter removes the shortest wavelengths, and what remains, typically 500 to 1200 nm, arrives in a single flash. A laser emits one wavelength, so every photon in the pulse has the same absorption profile in hair and in skin.
Illustrative image — not a patient.
Both work by selective photothermolysis. Melanin in the hair shaft and bulb absorbs the light, the light becomes heat, and the heat conducts to the structures that make the hair. The follicle has to be heated enough to lose its capacity to grow a hair while the epidermis, which also contains melanin, is spared. With a single wavelength, the operator chooses where on the melanin absorption curve to work. With a broad band, some of the light is always at wavelengths the surface pigment absorbs well.
Pulse length and cooling matter as much as the light source. Long-pulsed lasers spread heat through the follicle over milliseconds while a cooled tip or cryogen protects the surface. IPL systems vary widely in filters, pulse structure and cooling, which is why two machines sold as IPL can behave quite differently.
Dark stubble shadow, a common reason to compare IPL with laser. Illustrative video, not a patient.
Is IPL hair removal safe for Asian skin? Skin type and PIH risk
It depends on the skin tone of the area, and caution rises with it. Melanin in the epidermis competes with melanin in the follicle for the same light. On lighter skin with dark hair, most of the energy goes to the hair. As skin pigment rises, more of it is absorbed at the surface, and the window between a setting that heats the follicle and one that burns the skin narrows. A broad band, with its shorter wavelengths, narrows that window further.
Most patients in Singapore are Fitzpatrick III to V. In these skin types the complication that matters most is post-inflammatory hyperpigmentation: a darkening that follows heat injury or irritation and can take a long time to fade. Burns and blistering, and lighter patches, are the other risks of any light-based hair removal used on skin it does not suit.
A comprehensive review of laser and light treatments for hair reduction in Fitzpatrick IV to VI skin points to the long-pulsed 1064 nm Nd:YAG laser, with adequate cooling and conservative settings, as the approach that spares the epidermis more reliably in darker skin. Skin tone also varies across the body. The underarm and bikini line are often darker than the forearm, and a recent tan adds melanin to the surface until it fades, which is why the choice is made area by area rather than once for the whole body.
“A lamp and a laser can both heat a hair. What I am choosing between is how much of that heat the skin around it has to take, and on darker skin that is the whole decision.”
Dr Sin YongOn IPL and laser hair removal
What the comparative studies actually show
Head-to-head trials of IPL and lasers are few and small, so they are read as a direction rather than a verdict. Three are worth knowing.
Alexandrite laser vs IPL, face. A randomised split-face trial in women with polycystic ovary syndrome treated one side with a 755 nm alexandrite laser and the other with an IPL system. Hair counts fell further, and hair-free intervals were longer, on the laser side.
Diode laser vs IPL, underarm. A randomised, double-blind trial treated one underarm with a diode laser and the other with IPL. Both reduced hair counts; the diode was more effective and more uncomfortable, and neither caused serious adverse effects.
Systematic review. A Cochrane review of randomised trials found none of high methodological quality, reported short-term reduction with alexandrite and diode lasers, and found less evidence for IPL in the trials available at the time.
Two cautions apply. Most trials were run on lighter skin, so they say little about Fitzpatrick IV and V, which is where the safety difference between a lamp and a laser is greatest. And devices have changed since, in both categories. What the studies support is the principle: a wavelength matched to the hair and the skin delivers energy to the follicle more selectively than a broad band does.
Who suits IPL, who suits laser, and who suits neither
Hair colour, skin tone, the area and the cause of the hair decide the choice more than the device name does.
Situation
IPL
Laser
What to know
Dark, coarse hair on lighter skin
Can reduce hair at suitable settings
755 nm alexandrite or diode usually considered
Good contrast between hair and skin suits either
Fitzpatrick IV to VI, or tanned skin
Narrow margin; often excluded by makers
Long-pulsed 1064 nm Nd:YAG
Test patch and conservative energy; a fresh tan defers treatment
Underarm and bikini line
Caution: skin often darker than elsewhere
Often 1064 nm, or conservative 755 nm on lighter skin
Too little melanin for any light; electrolysis is the alternative and is not offered here
New or increasing facial hair in a woman
Assess the cause first
Assess the cause first
A hormonal cause such as polycystic ovary syndrome is worth checking before any device
Who should wait applies to both: a recent tan or self-tan, active infection or broken skin in the area, photosensitising medicines, recent isotretinoin, pregnancy and a keloid tendency are discussed at assessment. The laser hair removal suitability page covers these in full.
Home IPL devices vs clinic treatment
Home IPL devices use the same broad-band principle at energy capped for unsupervised use, usually with a skin-tone sensor that blocks darker tones. Lower energy makes them safer in untrained hands and is also why change tends to be gradual and needs upkeep. They suit lighter skin, dark coarse hair, small areas you can see well and no tan. They do not suit fine or light hair, areas near the eyes, darker skin, moles or tattoos in the area, or hair growth that may have a hormonal cause.
If you already use a home IPL device, mention it at assessment; it is usually paused while clinic treatment is under way so that the skin can be read accurately. The full comparison is on home IPL vs clinic laser hair removal.
CPL and OPT hair removal: other names for a flash lamp
CPL hair removal and OPT hair removal are trade names for flash-lamp systems that work on the same principle as IPL hair removal: a filtered broad band of light, typically 500 to 1200 nm, heats the melanin in the hair. OPT stands for optimal pulse technology, a manufacturer’s name for an IPL pulse delivered with a more even energy profile. CPL is expanded differently by different sellers, so the letters alone do not tell you the wavelength band, the filter or the cooling.
A new label does not change the physics. The skin still absorbs part of a broad band, so the caution for Fitzpatrick IV to VI skin set out above applies to CPL and OPT hair removal as much as to any IPL. White, grey, red and fine blonde hair still carry too little melanin for any lamp.
Questions worth asking before any light-based hair removal
Is the device a flash lamp or a laser, and what is its name?
Which filter or wavelength will be used on your skin tone, area by area?
Who sets the energy, and is a test area checked first on darker or tanned skin?
What happens if the skin darkens or blisters afterwards, and who reviews it?
Hair removal at the clinic on Orchard Road, Singapore, is laser-based, with long-pulsed 755 nm alexandrite and 1064 nm Nd:YAG; IPL, CPL and OPT systems are not used here. Who should wait before any of them is covered on laser hair removal suitability, and the lasers themselves on laser hair removal in Singapore.
How Dr Sin Yong plans hair removal
Hair removal at this practice runs on the R2 Glow platform, a long-pulsed laser carrying both 755 nm alexandrite and 1064 nm Nd:YAG. Dr Sin Yong examines the hair and the skin in each area and chooses the wavelength area by area: 755 nm where finer or lighter hair sits on lighter skin, 1064 nm where the skin is darker or recently tanned, and conservative settings with close attention to cooling in naturally darker zones such as the underarm and bikini line.
On darker, recently tanned or reactive skin a small test patch is treated first and reviewed before the full area. Earlier IPL or diode treatment elsewhere is taken into account when settings are chosen, patients shave rather than wax beforehand so the hair shaft stays in the follicle, and every session is doctor-supervised rather than run from a fixed protocol. Fees follow the areas planned and are set out in writing after assessment, as how fees are quoted explains.
1. MessageWhatsApp +65 8023 7170 with what is bothering you. A reply comes from the clinic, not a bot.
2. AssessmentDr Sin Yong examines you himself on Orchard Road, with ultrasound where earlier filler is involved.
3. A plan in writingWhat he would do, what he would not, the fee factors, and the option of no treatment.
Every treatment is performed by Dr Sin Yong personally. Singapore Medical Council registered · invited to share his clinical expertise internationally for CLASSYS, DEKA, Fotona, Hironic and Ilooda.
Book an assessment with Dr Sin Yong on Orchard Road; the wavelength is chosen for your skin, area by area, after examination. How consultations work.
Neither name settles the question. IPL is a broad-spectrum light source, typically 500–1200 nm, and is not a laser. SHR describes a delivery technique, lower fluence in rapid repeated passes, which can run on diode platforms and on some IPL systems. What matters for safety and response is the wavelength, the fluence and how well both are matched to skin type, which is why treatment here uses long-pulsed 755 nm or 1064 nm laser chosen area by area.
IPL hair removal is a light-based method that uses a filtered flash lamp, not a laser, to heat the melanin in hair. The lamp emits a broad band of wavelengths, typically 500 to 1200 nm, in one flash, and the heat is aimed at the follicle while the skin around it is spared. IPL hair removal suits dark hair on lighter skin, and the safety margin narrows as skin tone rises.
CPL hair removal is a trade name some salons and sellers use for a flash-lamp system that works like IPL hair removal: a filtered broad band of light heats the melanin in the hair. The letters are expanded differently by different sellers, so ask what the device is, which filter is used and how the skin is cooled. The skin-type cautions that apply to IPL apply to CPL hair removal too.
OPT hair removal uses optimal pulse technology, a manufacturer’s name for an IPL system designed to deliver each pulse with a more even energy profile. OPT is still a broad-band flash lamp rather than a laser, so hair colour, skin tone, the filter and the cooling decide suitability in the same way as for IPL. Hair removal at this clinic uses 755 nm and 1064 nm lasers instead.
No. IPL is a filtered flash lamp that emits many wavelengths at once, typically 500 to 1200 nm. A laser emits a single wavelength, such as 755 nm alexandrite or 1064 nm Nd:YAG. Both heat melanin in the hair follicle, but a single wavelength can be matched to the hair and the skin, which leaves a wider margin between heating the follicle and heating the surrounding skin.
It depends on the skin and the hair. On lighter skin with dark, coarse hair, both can reduce regrowth, and small head-to-head trials have tended to favour lasers on hair counts. As skin tone rises, the margin with a broad band narrows, and reviews point to the long-pulsed 1064 nm Nd:YAG laser for Fitzpatrick IV to VI skin. Fine, light or grey hair responds poorly to either.
The risk rises with skin tone. Epidermal melanin absorbs part of the broad band, so burns and post-inflammatory darkening become more likely in darker or tanned skin, and many IPL makers list darker tones as unsuitable. For Fitzpatrick IV to VI skin, the long-pulsed 1064 nm Nd:YAG laser with cooling is the approach reviews favour, usually after a test patch and with conservative settings.
Not reliably. Both depend on melanin in the hair to absorb the light, and white, grey, red and fine blonde hair carry too little of it, whatever the device. Electrolysis treats each follicle with a fine probe instead of light and is the usual alternative for such hair; it is not offered at this practice, so a referral is discussed where it fits.
Yes. Earlier IPL or laser treatment elsewhere is taken into account when settings are chosen, along with how the hair and skin look now. Hair that has become finer and lighter after earlier treatment can behave differently, and on lighter skin the 755 nm wavelength is often considered for it. Home IPL use is usually paused while clinic treatment is under way.
References
Laser and Light Treatments for Hair Reduction in Fitzpatrick Skin Types IV-VI: A Comprehensive Review of the Literature. American Journal of Clinical Dermatology 19(2), 2018. source
A randomised, split-face comparison of facial hair removal with the alexandrite laser and intense pulsed light system. Lasers in Surgery and Medicine 39(10), 2007. source
Comparison of the effect of diode laser versus intense pulsed light in axillary hair removal. Dermatologic Surgery 40(10), 2014. source
Laser and photoepilation for unwanted hair growth. Cochrane Database of Systematic Reviews (4), 2006. source
Hair removal by lasers and intense pulsed light sources. Dermatologic Clinics 20(1), 2002. source
About this page: written and medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last reviewed 5 November 2026 · Illustrative images only, not patients · Editorial policy
