What is IPL, and what isn't it?
IPL stands for intense pulsed light: a powerful flashlamp that fires brief, bright pulses of light into the skin, where specific targets absorb it, heat up and are destroyed or remodelled, leaving the surrounding skin untouched. Sun spots fade, broken capillaries close, tone evens, and the skin behaves younger.
First, the correction the whole industry trips over: despite being sold from the same menus and sometimes the same machines, IPL is not a laser. A laser produces one single, pure wavelength of light; IPL produces a broad flash of many wavelengths at once, shaped by filters. Both are light-based medicine, both descend from the same founding science, and the difference between them, one precise note versus a chord, turns out to explain almost everything about when each is used. By the end of this guide that sentence will feel obvious.
Light as medicine: the sniper principle.
Everything in this guide stands on one idea, published in the journal Science in 1983 by Harvard dermatologists Rox Anderson and John Parrish: selective photothermolysis. Strip the Greek away and it says something beautifully simple: different things in skin absorb different colours of light. Choose a colour that your target absorbs strongly and its surroundings don’t, deliver it in a pulse brief enough that heat can’t spread, and you can destroy a pigment spot or a broken vessel with sniper precision, while the skin a hair’s breadth away never knows it happened.
The targets even have a name worth learning: chromophores, the light-absorbers. Skin has three that matter here: melanin (pigment: sun spots, freckles, hair), haemoglobin (blood: redness, broken capillaries, rosacea flushing) and water (everything, which is what deep resurfacing lasers exploit). Every light treatment ever sold is just a choice of which chromophore to aim at, with which colour, for how long.
Wavelengths, for total beginners.
Wavelength is just the technical word for the colour of light, measured in nanometres (nm). Visible light runs from violet around 400nm to deep red around 700nm; beyond that lies invisible infrared. Two rules unlock everything:
- Shorter wavelengths are absorbed more eagerly, especially by melanin. Great for grabbing pigment, risky around pigment you don’t want grabbed.
- Longer wavelengths travel deeper and slip past melanin. Less drama at the surface, more reach underneath.
Now the machines make sense. IPL floods the skin with a broad band, roughly 500–1200nm, trimmed by cut-off filters, so it can address pigment and redness in the same session: a versatile chord. A laser plays one note perfectly: a 532nm device for surface pigment, a 1064nm device for depth and safety in darker skin, and so on. Chord or note. Breadth or precision. That’s the entire IPL-versus-laser debate, and you now understand it better than half the internet.
IPL vs laser, side by side.
| IPL | Laser | |
|---|---|---|
| Light | Broad flash, ~500–1200nm, shaped by filters | One precise wavelength |
| Personality | Generalist: pigment + redness + tone in one plan | Specialist: one target, maximum precision |
| Best at | Photorejuvenation: sun damage, mixed redness and pigment | Specific jobs: deep pigment, vessels, resurfacing, darker skin tones |
| Darker skin tones | Higher risk; needs caution and the right filters, often unsuitable | 1064nm lasers are the gold-standard safe option |
| Typical UK price/session | ~£100–£250 | Varies widely by device and indication |
What IPL treats.
- Sun damage and age spots. The signature result: pigmented spots absorb the flash, darken briefly, then flake away over days, like coffee grounds lifting off.
- Redness, broken capillaries and rosacea flushing. Haemoglobin absorbs the green-yellow part of the flash; treated vessels close and fade.
- Overall photorejuvenation. Tone evens, texture refines, and the gentle dermal heating nudges collagen: the “your skin but five years better” treatment.
- Hair reduction. The same pigment-absorption trick aimed at hair follicles, on suitable skin and hair types.
What it treats badly is just as important: melasma, the hormonal pigmentation covered in our peels guide, is notoriously prone to flaring after enthusiastic light treatment, and deeper skin tones need the next two sections read in full. IPL is a brilliant generalist with sharp edges, which is why the operator matters more than the machine.
Why we offer Lumecca.
We offer Lumecca, InMode’s IPL, in clinic, and the choice comes down to a single engineering word: power.
IPL’s historic weakness was diluted energy: a broad flash spread thinly needs many sessions to finish the job. Lumecca was built to fix exactly that, delivering, by InMode’s documentation, up to three times the energy of conventional IPL in the crucial 500–600nm range where pigment and vascular targets live. Two filter options (515nm and 580nm cut-offs) let the practitioner shape the flash to the job and the skin. The practical promise, and it is the manufacturer’s claim, our experience broadly endorsing it for the right concerns, is visible change in one to two sessions where conventional IPL plans four to six. Fewer, better flashes: that’s the pitch, and it’s why it earned a place in a medic-led clinic.
The Aerolase story: a laser worth knowing.
Now for the device that solves the problem IPL can’t, and note the category change: Aerolase Neo is a laser, not an IPL: a 1064nm Nd:YAG, the long, melanin-passing wavelength from our spectrum diagram, with one defining trick. It delivers its energy in 650 microseconds, faster than skin’s thermal relaxation time, meaning the target is treated before heat can spread and accumulate. The practical consequences: near-painless treatment without anaesthetic or even skin contact, and, most importantly, safety across all Fitzpatrick skin types, I to VI.
That combination has made it a quiet favourite among dermatologists treating skin of colour, acne, rosacea and pigmentation, with American specialists vocal about it:
(Source declared: that quote appears in the manufacturer’s own clinical publication, so weigh it accordingly; Dr Burgess’s standing in treating skin of colour is independently established.) Aerolase’s UK footprint is still early compared with its US presence, but it belongs in this guide for what it represents: the wavelength-and-pulse physics of this whole chapter, engineered specifically so that every skin tone gets a safe seat at the light-treatment table.
Skin tones and light: the section that matters most.
Here is the conversation the industry historically fumbled, told straight. IPL’s flash is absorbed by melanin, wherever it is. In fair skin, the melanin is concentrated in the sun spot you’re targeting, so the physics works perfectly. In deeper skin tones, the surrounding skin itself is rich in melanin, so it competes for the flash, and energy meant for a spot can heat the whole surface: burns and post-inflammatory pigmentation are the documented risks.
The professional response is not “no treatments for darker skin”: it’s the right physics for the skin in the chair. Longer wavelengths, 1064nm above all, pass through epidermal melanin and treat at depth safely, which is precisely the Aerolase story above and why 1064nm Nd:YAG is the gold standard for Fitzpatrick IV to VI. A practitioner who assesses honestly, knows their device’s limits and refers when the technology doesn’t fit is displaying the highest skill in this field. A practitioner who flashes every face the same way is displaying the opposite.
The treatment journey.
A light-treatment course begins before any light: consultation, Fitzpatrick assessment, medication review and a patch test are the professional baseline. Skin should arrive untanned (real or fake: both load the skin with competing pigment), which is why autumn and winter are peak season here just as with peels.
The session itself: cooling gel, eye shields (non-negotiable: these flashes and eyes must never meet), then the handpiece moves zone by zone, each pulse the famous warm elastic-band snap. Twenty to thirty minutes for a face. Afterwards, skin runs warm and slightly flushed for a few hours; treated pigment characteristically darkens first, looking like coffee grounds for several days, before flaking away to reveal the result. Then the rule you could now recite in your sleep: SPF 30+, every single day, both to protect the result and because light-treated skin is temporarily more sun-sensitive. Conventional courses run four to eight sessions a month apart; high-powered devices compress that, as covered above.
Who performs it, and what it costs.
Energy-based treatments sit in advanced practice in the UK: device-specific training, appropriate insurance and, depending on nation and locality, licensing requirements shape who may treat (the UK’s rules are a patchwork, with regulation continuing to evolve, so we describe practice rather than recite law). The consistent truth across every regime: in light-based treatment, the operator is the safety system. Choose clinics where assessment is unhurried, patch tests are routine and “this device isn’t right for your skin” is a sentence they’re visibly willing to say.
Pricing: UK IPL photorejuvenation typically runs £100–£250 per session with courses packaged from several hundred pounds; high-powered IPL and specialist lasers price above that, reflecting fewer sessions needed. For practitioners eyeing this field: it’s the natural summit of a skincare career, approached through foundations, advanced qualifications and then device training, the staircase our advanced pathway exists to climb.
Contraindications and risks.
The screening list, which a good consultation walks through unprompted: recent tanning or sunburn (the big one), photosensitising medication (including some antibiotics and retinoids), pregnancy as a precaution, active skin infection or cold sores in the area, a history of melasma (flare risk), epilepsy triggered by flashing light, and recent strong treatments in the same zone. Eye protection is absolute for client and practitioner alike.
The risks when corners are cut: burns, blistering, post-inflammatory hyper- or hypopigmentation (darker patches or pale ones), and the heartbreak version, a melasma flare that took months to earn and longer to settle. Every one traces to the same three failures, wrong skin assessment, wrong settings, absent aftercare, and every one is why this guide keeps landing on the same word: training.
IPL & laser FAQs.
What does IPL feel like?
The classic description is a hot elastic band snapping against the skin, one flash at a time, with modern high-spec devices and cooling making it considerably more comfortable than IPL's old reputation. Sessions are quick, often twenty to thirty minutes for a full face.
How many IPL sessions will I need?
Conventional IPL photorejuvenation is usually planned as a course of four to eight sessions about a month apart. Higher-powered devices like Lumecca are marketed on visible change in one to two sessions, a manufacturer claim our clinical experience broadly supports for the right concerns, though plans are always individual.
Is IPL safe for dark skin?
This is the most important question in the whole field, and the honest answer is: conventional IPL carries genuinely higher risk for deeper skin tones, because the melanin in the skin competes for the light meant for the target. That's not a reason to be excluded from light treatments; it's a reason to be treated with the right technology, such as longer-wavelength 1064nm lasers, by someone trained in skin of colour. Read the skin tones section above; it matters.
Is IPL the same as laser hair removal?
Related but not identical. Both use light absorbed by pigment in the hair to disable the follicle; IPL uses a broad flash while dedicated lasers use a single wavelength, generally giving lasers the edge for speed and for safety on darker skin. Many clinics use IPL platforms for hair reduction perfectly well on suitable skin types.
Why has my IPL pigmentation come back?
IPL clears the pigment that exists; it doesn't switch off the factory that made it. Sun exposure, hormones and time can produce new pigment, which is why results last longest with religious SPF and sensible maintenance, and why conditions like melasma need specialist management rather than enthusiastic flashing, as covered in our chemical peels guide.
Can beauty therapists perform IPL in the UK?
Rules vary across the UK (England, Scotland, Wales and Northern Ireland treat special procedures differently), and in practice access is governed by training, device requirements, local licensing where it applies, and insurance. IPL sits in advanced practice: device-specific certification and proper insurance are the consistent baseline, and reputable clinics exceed it.
Where does MSTA fit in?
We offer Lumecca IPL in clinic as part of our medic-led practice, and our advanced training pathways build practitioners towards energy-based treatments responsibly: foundations first, devices later. If light-based skin treatment is where you want your career to go, a discovery call will map the route.
References and further reading.
From the 1983 paper that started everything to the device documentation behind this guide’s claims, flagged as manufacturer-published where that’s the case.
- Anderson RR, Parrish JA. Selective photothermolysis: precise microsurgery by selective absorption of pulsed radiation. Science (1983): the founding theory of all modern light-based skin treatment. (source)
- InMode white paper: Lumecca peak power versus conventional IPL (manufacturer documentation). (source)
- Aerolase: the 650-microsecond 1064nm Nd:YAG laser, indications and skin-of-colour evidence (manufacturer-published clinical articles). (source)
- Improvement of rosacea-associated erythema and telangiectasias in skin of colour with a 650-microsecond 1064nm Nd:YAG laser (clinical article). (source)
- UK IPL photorejuvenation pricing context (consumer price guides). (source)