Best red light masks tested: 6 winners, 2 to avoid in 2026
How to choose a red light face mask: Look at wavelength first
There are some ways to tell that a red light face mask won’t be effective before you buy it and use it for a few months.
Wavelength is the first factor anyone will tell you to consider. You want to find products that emit light within the therapeutic window, or the range of wavelengths that can be effective when treating common skin conditions. There is now an abundance of evidence that specific wavelengths of red light can be effective for:
Reduction of fine lines, dark circles, and crow’s feet
Improving skin texture
Fighting wrinkles
Boosting collagen production
Reducing inflammation and redness
To be effective, the light coming from the mask must penetrate different layers of your skin. There are optimal wavelengths for each type of light a face mask emits, and any reputable brand will put their mask’s wavelengths front and center in the listing. These carefully chosen ranges are strong enough to penetrate your skin, but gentle enough to avoid over-activating delicate face skin.
Red light does its work in the middle layer (dermis) of your skin, requiring wavelengths between 630 and 633 nm to reach past the top layer. There, red light stimulates cells to produce rejuvenating proteins like collagen and elastin, evening out surface redness, and preventing scarring or post-pimple red spots.
The Shark CryoGlow’s Better Aging routine combines red and near-infrared light.
Credit: Leah Stodart / Mashable
The Shark CryoGlow’s Skin Clearing routine uses a special sequence of red, near-infrared, and blue light.
Credit: Leah Stodart / Mashable
Most red light masks also use near-infrared red light therapy, which requires longer wavelengths to travel further than regular red light. Near-infrared light between 830 and 850 nm reaches into tissue under the dermis to further stimulate cell turnover, firm skin, and heal deep-seated spots or stubborn dark circles.
What about blue light therapy?
Blue light is often used to target acne, and some of the best red light masks use a combination of blue and red light therapy.
Blue light operates on the top layer (epidermis) of your skin, so its ideal wavelength is shorter than either red light standard. Blue light at 415nm has an antimicrobial effect, ideally killing the bacteria that cause acne before a breakout starts. If hellbent bacterial acne makes it past the blue light phase — or if you’re also dealing with hormonal or cystic acne not caused by bacteria — red light swoops in to neutralize inflammation and speed up the healing process.
The thing is, most mainstream LED face masks hit those wavelength marks. So, how do you choose between masks if their wavelength numbers are all the same?
The importance of irradiance
Irradiance is another major element that determines whether or not a red light mask actually works. While wavelength refers to the length the light can travel, irradiance refers to the amount of light energy that’s actually reaching your skin per session (not just the intensity of light being generated at the bulb). If wavelength numbers are correct but irradiance is low, the mask will still be kind of a dud.
Bulb placement is one of the key factors we considered in our test.
Credit: Leah Stodart / Mashable
Comfort is another key factor, as consistent use is key to results.
Credit: Miller Kern / Mashable
Irradiance is officially expressed as milliwatts per square centimeter. The optimal irradiance range for a red light face mask is pretty wide (anywhere between 30 and 100 mW/cm²), though many brands don’t directly provide that number.
Most brands do note the length of each session, which is one way to quickly gauge irradiance without getting into calculations. Dr. Mamina Turegano sums it up best on her YouTube account: “Higher irradiance means more effective energy delivery per minute of use.” Longer sessions don’t automatically mean that results will be more powerful — a mask with sessions that last for less than 10 minutes has higher irradiance than a mask with sessions that last for 20 to 30 minutes. Since a mask with lower irradiance needs to sit on your face for longer, you might be less likely to keep up with wearing it.
Are bulb count and bulb placement a big deal?
The number of bulbs and the placement of bulbs inside the mask can also impact efficacy, especially if you’re expecting results on a specific area of your face. Masks with more bulbs packed evenly across the face will provide more even coverage across every inch of your face than masks with more sporadically-placed bulbs.
Some masks also provide more light sources overall by emitting both red and blue light simultaneously from every single bulb, like the Shark CryoGlow. This would be a better option for full-face acne prevention than masks with blue and red LEDs only concentrated in certain spots, like the Dr. Dennis Gross DRx SpectraLite.
What red light masks worked for us?
Of course, you probably didn’t come here for a science lesson. You want to find the best red light masks Mashable’s testers used and loved.
After trying out 11 different products, we ultimately found six that we can recommend. These masks delivered visible results for our product testers.
Remember: Consistency is essential for the best results (or any results)with LED face masks. You’ll need to wear your mask consistently for at least 1-2 months.
#red #light #masks #tested #winners #avoid
How to choose a red light face mask: Look at wavelength first
There are some ways to tell that a red light face mask won’t be effective before you buy it and use it for a few months.
Wavelength is the first factor anyone will tell you to consider. You want to find products that emit light within the therapeutic window, or the range of wavelengths that can be effective when treating common skin conditions. There is now an abundance of evidence that specific wavelengths of red light can be effective for:
Reduction of fine lines, dark circles, and crow’s feet
Improving skin texture
Fighting wrinkles
Boosting collagen production
Reducing inflammation and redness
To be effective, the light coming from the mask must penetrate different layers of your skin. There are optimal wavelengths for each type of light a face mask emits, and any reputable brand will put their mask’s wavelengths front and center in the listing. These carefully chosen ranges are strong enough to penetrate your skin, but gentle enough to avoid over-activating delicate face skin.
Red light does its work in the middle layer (dermis) of your skin, requiring wavelengths between 630 and 633 nm to reach past the top layer. There, red light stimulates cells to produce rejuvenating proteins like collagen and elastin, evening out surface redness, and preventing scarring or post-pimple red spots.
The Shark CryoGlow’s Better Aging routine combines red and near-infrared light. Credit: Leah Stodart / Mashable
The Shark CryoGlow’s Skin Clearing routine uses a special sequence of red, near-infrared, and blue light. Credit: Leah Stodart / Mashable
Most red light masks also use near-infrared red light therapy, which requires longer wavelengths to travel further than regular red light. Near-infrared light between 830 and 850 nm reaches into tissue under the dermis to further stimulate cell turnover, firm skin, and heal deep-seated spots or stubborn dark circles.
What about blue light therapy?
Blue light is often used to target acne, and some of the best red light masks use a combination of blue and red light therapy.
Blue light operates on the top layer (epidermis) of your skin, so its ideal wavelength is shorter than either red light standard. Blue light at 415nm has an antimicrobial effect, ideally killing the bacteria that cause acne before a breakout starts. If hellbent bacterial acne makes it past the blue light phase — or if you’re also dealing with hormonal or cystic acne not caused by bacteria — red light swoops in to neutralize inflammation and speed up the healing process.
The thing is, most mainstream LED face masks hit those wavelength marks. So, how do you choose between masks if their wavelength numbers are all the same?
The importance of irradiance
Irradiance is another major element that determines whether or not a red light mask actually works. While wavelength refers to the length the light can travel, irradiance refers to the amount of light energy that’s actually reaching your skin per session (not just the intensity of light being generated at the bulb). If wavelength numbers are correct but irradiance is low, the mask will still be kind of a dud.
Bulb placement is one of the key factors we considered in our test. Credit: Leah Stodart / Mashable
Comfort is another key factor, as consistent use is key to results. Credit: Miller Kern / Mashable
Irradiance is officially expressed as milliwatts per square centimeter. The optimal irradiance range for a red light face mask is pretty wide (anywhere between 30 and 100 mW/cm²), though many brands don’t directly provide that number.
Most brands do note the length of each session, which is one way to quickly gauge irradiance without getting into calculations. Dr. Mamina Turegano sums it up best on her YouTube account: “Higher irradiance means more effective energy delivery per minute of use.” Longer sessions don’t automatically mean that results will be more powerful — a mask with sessions that last for less than 10 minutes has higher irradiance than a mask with sessions that last for 20 to 30 minutes. Since a mask with lower irradiance needs to sit on your face for longer, you might be less likely to keep up with wearing it.
Are bulb count and bulb placement a big deal?
The number of bulbs and the placement of bulbs inside the mask can also impact efficacy, especially if you’re expecting results on a specific area of your face. Masks with more bulbs packed evenly across the face will provide more even coverage across every inch of your face than masks with more sporadically-placed bulbs.
Some masks also provide more light sources overall by emitting both red and blue light simultaneously from every single bulb, like the Shark CryoGlow. This would be a better option for full-face acne prevention than masks with blue and red LEDs only concentrated in certain spots, like the Dr. Dennis Gross DRx SpectraLite.
What red light masks worked for us?
Of course, you probably didn’t come here for a science lesson. You want to find the best red light masks Mashable’s testers used and loved.
After trying out 11 different products, we ultimately found six that we can recommend. These masks delivered visible results for our product testers.
Remember: Consistency is essential for the best results (or any results)with LED face masks. You’ll need to wear your mask consistently for at least 1-2 months.
![This former notorious red-light district is now one of the world’s top AI hubs | TechCrunch
What every U.K. AI startup wants to know these days is, how can I get office space in King’s Cross?
The area is so hot that a VC firm allegedly recently won a deal by promising a founder office space in the neighborhood. “We stop at nothing to win deals [for] and to support” founders, “including helping them source office space when needed,” the firm told me when asked about the rumor, declining to confirm or deny any details.
The neighborhood’s popularity began back in 2016 when DeepMind — then newly acquired by Google — moved in. Soon after, a flood of AI startups followed, wanting to be around the Google DeepMind magic. Today, they hope to take advantage of the cluster of AI talent there.
This has transformed King’s Cross into one of the world’s top AI hubs, rivaled only by San Francisco and Beijing. Around London, it’s known by the sobriquet “Knowledge Quarter,” as it’s home to names like OpenAI, Meta, Isomorphic Labs, Cusp AI, Wayne, Recursive, and, a little farther down the road, Synthesia and Anthropic. The European Technology Network (ETN) just moved into a glossy new office nearby, while University College London sits around the corner.
Mixed in with the new developments are trendy food spots like Hoppers and BAO. Hop a train from King’s Cross, and founders can be in Cambridge in 45 minutes to source talent or can be in Paris in two hours to strike a deal.
Who would have guessed that a little more than 20 years ago, this was one of the seediest areas in London?
“In the ’80s, crack and heroin made the area a major narcotics market,” Hussein Kanji, an investor at Hoxton Ventures, said, recalling syringes in tree trunks and gangs patrolling the streets. “In 1982, the local church was occupied by the English Collective of Prostitutes for 12 straight days.” Then, in the early 2000s, a real estate developer had a dream and, well, “now it is the AI hotbed of the United Kingdom,” Kanji said. “What a change.” Around 18 months ago, his portfolio company BioCorteX moved from the neighborhood Holborn to the Jellicoe building in King’s Cross, hoping to be near the action. “Lots going on in London right now,” Nik Sharma, co-founder of BioCorteX, told me. “Lots of hyperscalers moving in.” That includes, reportedly, Jeff Bezos’ AI company Prometheus, which is also said to be in talks to move into the Jellicoe.
There are around 3,600 AI startups in London, which, together, have raised around .1 billion out of the .8 billion raised in the city since late July, according to Dealroom. Since the start of June, AI-related startups have leased more than 1 million square feet of office space in London, according to the real estate firm Knight Frank. With that, prime rents in King’s Cross have risen 18% over the past three years, Chris Dunn, a commercial insight associate at the firm, told me. That percentage represents only the largest leases encompassing at least 10,000 square feet, like the ones OpenAI and Prometheus are signing. The shorter deals go for even more, he said, and now the vacancy rate for conventional office space is just 0.9%. “Demand has outstripped supply,” he continued.
Today, one of the big topics of the area is sovereignty. It was a wake-up call for many when Anthropic shut off access to Mythos and Fable this summer, leaving some in the ecosystem to conclude: “We’d better look after ourselves,” Saul Klein, co-founder of the VC firm Phoenix Court, told me.
Phoenix Court is located in the King’s Cross area and has three portfolio companies in the vicinity, including Olix (which just announced a .3 billion valuation), Early Health and CoMind. Robin Klein, co-founder of the firm, said the shutdown of Fable and Mythos access was a “small but sharp reminder that Europe can’t simply rent its AI capabilities and capacity; it needs to build and hold some of its own.” King’s Cross, he said, is where much of this building is actually happening.
“The bigger question,” he continued, “is whether the U.K. builds the infrastructure, compute, energy, capital, to make this self-reliance durable, rather than just hosting outposts of U.S. labs.”
Image Credits:Phoenix Court
Top founders want to stay
Simon Kohl, founder of Latent Labs, has offices in King’s Cross and San Francisco. The London office, at the moment, is growing faster, and he’s more bullish than ever on the ecosystem, he said. “The mood right now feels less like London trying to catch up and more like London becoming one of the default places to start a serious AI company,” he said. Look around and you are likely to see Wayve testing its autonomous cars. Founded in 2017 by co-founder Alex Kendall, the unicorn is one of London’s biggest success stories.
“Ten years ago, building a frontier AI company from London felt like an unusual choice,” Kendall told me. “Now it feels like an obvious one.” Wayve moved into King’s Cross in 2018 looking for a space that could double as a garage — “a rare combination in Central London,” Kendall said. He has watched the ecosystem mature around him — and it’s now evident that a startup can stay in London, raise serious capital, hire world-class AI talent, and remain globally competitive, he said. Down the street from Anthropic’s new 158,000-square-foot office is the AI agent builder Sierra and the AI video platform Synthesia.
Laura Gonzalez Florez, Synthesia’s chief of staff and head of people, says the company moved into its glossy new office building a year ago to accommodate its growing team. They were drawn to the area for the same reason as everyone else: “It’s very close to the airport … very close to where a lot of investors are,” she said.
Image Credits:Synthesia
Around two-thirds of Synthesia’s engineers are remote, Gonzalez Florez said, letting the company tap into an affordable, international, and diverse talent pool and helping it scale faster. “From London, we can hire and work, without any problem, people from anywhere, from Slovenia to Portugal,” she said.
Unsurprisingly, London’s AI boom is also causing a talent war.U.K. AI job postings have skyrocketed in the past few years, per data from PwC. When Anthropic announced it moved into town earlier this year, it listed, for example, a salary range of £260,000 to £630,000 for a machine learning research engineer when the average salary in London for the same role is around £102,000. Some founders in the U.K., like those in Silicon Valley, are being forced to raise more and bigger rounds to keep up.
“The real test is whether more globally significant AI companies are founded, funded, and scaled from the U.K., while continuing to attract the world’s best talent to build them here,” Zain Ali, founder of the King’s Cross-based AI legal firm Centuro, told me. “If that continues to happen, King’s Cross won’t just be an AI hub. It’ll become one of the U.K.’s most important strategic assets.”
When you purchase through links in our articles, we may earn a small commission. This doesn’t affect our editorial independence.#Thisformernotorious #redlight #districtis #nowone #worlds #top #hubs #TechCrunchUK This former notorious red-light district is now one of the world’s top AI hubs | TechCrunch
What every U.K. AI startup wants to know these days is, how can I get office space in King’s Cross?
The area is so hot that a VC firm allegedly recently won a deal by promising a founder office space in the neighborhood. “We stop at nothing to win deals [for] and to support” founders, “including helping them source office space when needed,” the firm told me when asked about the rumor, declining to confirm or deny any details.
The neighborhood’s popularity began back in 2016 when DeepMind — then newly acquired by Google — moved in. Soon after, a flood of AI startups followed, wanting to be around the Google DeepMind magic. Today, they hope to take advantage of the cluster of AI talent there.
This has transformed King’s Cross into one of the world’s top AI hubs, rivaled only by San Francisco and Beijing. Around London, it’s known by the sobriquet “Knowledge Quarter,” as it’s home to names like OpenAI, Meta, Isomorphic Labs, Cusp AI, Wayne, Recursive, and, a little farther down the road, Synthesia and Anthropic. The European Technology Network (ETN) just moved into a glossy new office nearby, while University College London sits around the corner.
Mixed in with the new developments are trendy food spots like Hoppers and BAO. Hop a train from King’s Cross, and founders can be in Cambridge in 45 minutes to source talent or can be in Paris in two hours to strike a deal.
Who would have guessed that a little more than 20 years ago, this was one of the seediest areas in London?
“In the ’80s, crack and heroin made the area a major narcotics market,” Hussein Kanji, an investor at Hoxton Ventures, said, recalling syringes in tree trunks and gangs patrolling the streets. “In 1982, the local church was occupied by the English Collective of Prostitutes for 12 straight days.” Then, in the early 2000s, a real estate developer had a dream and, well, “now it is the AI hotbed of the United Kingdom,” Kanji said. “What a change.” Around 18 months ago, his portfolio company BioCorteX moved from the neighborhood Holborn to the Jellicoe building in King’s Cross, hoping to be near the action. “Lots going on in London right now,” Nik Sharma, co-founder of BioCorteX, told me. “Lots of hyperscalers moving in.” That includes, reportedly, Jeff Bezos’ AI company Prometheus, which is also said to be in talks to move into the Jellicoe.
There are around 3,600 AI startups in London, which, together, have raised around .1 billion out of the .8 billion raised in the city since late July, according to Dealroom. Since the start of June, AI-related startups have leased more than 1 million square feet of office space in London, according to the real estate firm Knight Frank. With that, prime rents in King’s Cross have risen 18% over the past three years, Chris Dunn, a commercial insight associate at the firm, told me. That percentage represents only the largest leases encompassing at least 10,000 square feet, like the ones OpenAI and Prometheus are signing. The shorter deals go for even more, he said, and now the vacancy rate for conventional office space is just 0.9%. “Demand has outstripped supply,” he continued.
Today, one of the big topics of the area is sovereignty. It was a wake-up call for many when Anthropic shut off access to Mythos and Fable this summer, leaving some in the ecosystem to conclude: “We’d better look after ourselves,” Saul Klein, co-founder of the VC firm Phoenix Court, told me.
Phoenix Court is located in the King’s Cross area and has three portfolio companies in the vicinity, including Olix (which just announced a .3 billion valuation), Early Health and CoMind. Robin Klein, co-founder of the firm, said the shutdown of Fable and Mythos access was a “small but sharp reminder that Europe can’t simply rent its AI capabilities and capacity; it needs to build and hold some of its own.” King’s Cross, he said, is where much of this building is actually happening.
“The bigger question,” he continued, “is whether the U.K. builds the infrastructure, compute, energy, capital, to make this self-reliance durable, rather than just hosting outposts of U.S. labs.”
Image Credits:Phoenix Court
Top founders want to stay
Simon Kohl, founder of Latent Labs, has offices in King’s Cross and San Francisco. The London office, at the moment, is growing faster, and he’s more bullish than ever on the ecosystem, he said. “The mood right now feels less like London trying to catch up and more like London becoming one of the default places to start a serious AI company,” he said. Look around and you are likely to see Wayve testing its autonomous cars. Founded in 2017 by co-founder Alex Kendall, the unicorn is one of London’s biggest success stories.
“Ten years ago, building a frontier AI company from London felt like an unusual choice,” Kendall told me. “Now it feels like an obvious one.” Wayve moved into King’s Cross in 2018 looking for a space that could double as a garage — “a rare combination in Central London,” Kendall said. He has watched the ecosystem mature around him — and it’s now evident that a startup can stay in London, raise serious capital, hire world-class AI talent, and remain globally competitive, he said. Down the street from Anthropic’s new 158,000-square-foot office is the AI agent builder Sierra and the AI video platform Synthesia.
Laura Gonzalez Florez, Synthesia’s chief of staff and head of people, says the company moved into its glossy new office building a year ago to accommodate its growing team. They were drawn to the area for the same reason as everyone else: “It’s very close to the airport … very close to where a lot of investors are,” she said.
Image Credits:Synthesia
Around two-thirds of Synthesia’s engineers are remote, Gonzalez Florez said, letting the company tap into an affordable, international, and diverse talent pool and helping it scale faster. “From London, we can hire and work, without any problem, people from anywhere, from Slovenia to Portugal,” she said.
Unsurprisingly, London’s AI boom is also causing a talent war.U.K. AI job postings have skyrocketed in the past few years, per data from PwC. When Anthropic announced it moved into town earlier this year, it listed, for example, a salary range of £260,000 to £630,000 for a machine learning research engineer when the average salary in London for the same role is around £102,000. Some founders in the U.K., like those in Silicon Valley, are being forced to raise more and bigger rounds to keep up.
“The real test is whether more globally significant AI companies are founded, funded, and scaled from the U.K., while continuing to attract the world’s best talent to build them here,” Zain Ali, founder of the King’s Cross-based AI legal firm Centuro, told me. “If that continues to happen, King’s Cross won’t just be an AI hub. It’ll become one of the U.K.’s most important strategic assets.”
When you purchase through links in our articles, we may earn a small commission. This doesn’t affect our editorial independence.#Thisformernotorious #redlight #districtis #nowone #worlds #top #hubs #TechCrunchUK](https://techcrunch.com/wp-content/uploads/2026/08/DM9A2852.jpg?w=680)

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