The Radia Journal
The science of light, studied slowly.
Evidence-led writing on photobiomodulation, ritual, and the devices worth your money. No sponsorship. No filler.
45 articles · Updated regularly
Featured · Comparisons
Radia vs CurrentBody Skin LED Mask: An Honest 2025 Comparison
A side-by-side comparison of the Radia Halo and the CurrentBody Skin LED Mask — wavelengths, irradiance, session time, price, and which one is right for your skin.
8 min read · Read article →
Comparisons
8 articlesComparisons · 7 min
Radia vs Omnilux Contour Face: Which LED Mask Is Worth It?
Omnilux Contour pioneered FDA-cleared at-home LED. We compare it to Radia Halo on wavelengths, irradiance, comfort, and price.
Read article
Comparisons · 7 min
Radia vs Dr. Dennis Gross DRx SpectraLite FaceWare Pro
The DRx SpectraLite was the first hard-shell LED mask many readers tried. Here is how it compares to Radia Halo in 2025.
Read article
Comparisons · 6 min
Radia vs Shark CryoGlow: LED Plus Cooling Or Just LED?
Shark CryoGlow adds under-eye cooling to its LED mask. Is it worth the extra spend over a focused device like Radia Halo?
Read article
Comparisons · 6 min
Radia vs Solawave: Wand or Mask — What Actually Works?
Solawave popularised handheld LED wands. We compare them to a full-face mask like Radia Halo on dose, coverage, and consistency.
Read article
Comparisons · 6 min
LED Mask at Home vs In-Clinic LED Treatment: Worth the Spa Trip?
A clinic LED panel costs $75 per session. An at-home mask costs a few hundred dollars. Here is how the dose actually compares.
Read article
Comparisons · 8 min
LED Mask vs Microcurrent vs Microneedling: Which Device Should You Buy First?
Three popular at-home devices, three entirely different mechanisms. A clear comparison of what each one actually does.
Read article
Comparisons · 8 min
Silicone vs Rigid LED Masks: Why Fit Is a Dose Specification
Flexible silicone or a hard shell? The comparison matters more than comfort, because the gap between the LEDs and your skin decides how much light you actually receive.
Read article
Comparisons · 8 min
LED Mask vs Red Light Panel vs Red Light Bed: Which Should You Buy?
Three delivery formats for the same wavelengths. A clear comparison of dose, coverage, cost and what each one is genuinely good for.
Read article
The Science
12 articlesThe Science · 7 min
What Red Light Therapy Actually Does to Your Skin
A clear, evidence-based breakdown of what red light at 633 nm does inside skin cells — and what it cannot do.
Read article
The Science · 6 min
Red Light vs Blue Light Therapy: Which One Do You Need?
Red light targets collagen and inflammation. Blue light targets acne bacteria. Here is how to choose — or combine them.
Read article
The Science · 6 min
LED Face Mask Side Effects: What's Real and What's Not
Honest reporting on the rare side effects of at-home LED therapy and how to avoid them.
Read article
The Science · 6 min
Red Light Therapy for Wrinkles: The Honest Mechanism
How red and near-infrared light actually reduce fine lines — and the realistic ceiling on what at-home devices can do.
Read article
The Science · 5 min
Is It Safe to Use an LED Face Mask During Pregnancy?
A careful, evidence-led look at what we know about LED therapy during pregnancy and breastfeeding.
Read article
The Science · 6 min
LED Masks for Dark Spots and Hyperpigmentation: The Truth
LED therapy helps post-inflammatory redness, but melasma is a different story. Here is how to think about it.
Read article
The Science · 9 min
The Science of Red Light and Collagen: A Deep Dive
A readable, fully-referenced explanation of how 633 nm and 830 nm light upregulate collagen synthesis.
Read article
The Science · 10 min
Red Light Therapy Wavelengths Explained: 415, 590, 633, 660, 810, 830, 850 nm
Every wavelength used in at-home LED therapy, what it does, and which ones actually have peer-reviewed evidence behind them.
Read article
The Science · 9 min
Do LED Face Masks Really Work? What the Evidence Actually Shows
A skeptic-first look at the clinical evidence for at-home LED therapy — what is well established, what is overstated, and who should not bother.
Read article
The Science · 9 min
Irradiance, Fluence and Dose: The Numbers That Decide If a Mask Works
Why two masks with identical wavelengths can deliver wildly different results — and how to calculate the dose you are actually getting.
Read article
The Science · 7 min
The NASA Story Behind Red Light Therapy — Separating Fact From Marketing
Red light therapy really does have a NASA origin story. Here is what actually happened, and how the claim gets stretched.
Read article
The Science · 8 min
LED Face Masks and Eye Safety: Do You Really Need Goggles?
Whether red and near-infrared light can damage your eyes, what the safety classifications mean, and the one situation where you must not run a session.
Read article
How To
17 articlesHow To · 6 min
How Often Should You Use an LED Face Mask?
The exact frequency that delivers results without wasting sessions — based on published photobiomodulation dosing data.
Read article
How To · 6 min
LED Mask Before-and-After: A Realistic 12-Week Timeline
What to actually expect at week 2, week 4, week 8, and week 12 of consistent LED mask use.
Read article
How To · 6 min
Red Light Therapy for Acne: Does It Actually Work?
Red light reduces acne inflammation. Blue light kills acne bacteria. Here is how to use both — or just one.
Read article
How To · 6 min
How to Use an LED Face Mask: The Step-by-Step Routine
The skincare order that maximises LED absorption, plus what to apply afterwards to lock in results.
Read article
How To · 7 min
LED Therapy for Men: A Practical Guide to At-Home Light Care
Thicker dermis, more sebum, more shaving irritation. How men should think about LED masks and what to actually look for.
Read article
How To · 8 min
How to Stack LED Therapy With Retinol, Vitamin C, Peptides and Acids
The exact order to apply your actives around an LED session so nothing cancels out and nothing irritates.
Read article
How To · 6 min
LED Therapy for the Neck, Chest, and Décolleté: The Overlooked Zone
The neck ages faster than the face. Here is how to extend LED therapy below the jawline without buying extra hardware.
Read article
How To · 6 min
Seven LED Mask Mistakes Most First-Time Users Make
The avoidable errors that quietly cut your results in half — and the fixes that take less than a minute.
Read article
How To · 7 min
LED Therapy for Rosacea and Persistent Redness
Red and near-infrared light are among the gentlest options for reactive, flushed skin. Here is the protocol, and the two mistakes that make rosacea worse.
Read article
How To · 7 min
LED Masks for Sensitive Skin: A Cautious Person's Guide
How to introduce light therapy to skin that reacts to almost everything — patch testing, session ramping, and what to remove from your routine first.
Read article
How To · 8 min
LED Therapy After Botox, Fillers, Microneedling and Peels
Exactly how long to wait before resuming light therapy after each common in-clinic procedure, and why LED shortens downtime.
Read article
How To · 7 min
LED Therapy for Under-Eye Bags and Dark Circles
Which type of dark circle responds to light therapy and which does not — plus a safe protocol for the thinnest skin on the face.
Read article
How To · 8 min
LED Therapy After 50: What Changes and What to Expect
Post-menopausal skin loses collagen faster and responds to light therapy differently. A realistic protocol and honest ceiling on results.
Read article
How To · 7 min
Morning or Night? The Best Time of Day to Use an LED Mask
Whether timing changes your results, how to fit sessions around retinoids, sunscreen and sleep, and why the answer is mostly about adherence.
Read article
How To · 9 min
The 30-Day LED Protocol: A Week-by-Week Plan for Your First Month
Exactly what to do in weeks one to four, what you should and should not see, and the two checkpoints that predict whether you will still be using the device at month three.
Read article
How To · 6 min
How to Clean and Care for an LED Face Mask
The two-minute routine that prevents breakouts, protects the LEDs, and keeps a device working for years — plus what never to use on one.
Read article
How To · 7 min
Does LED Therapy Help Large Pores and Rough Texture?
Pore size cannot be shrunk, but the three things that make pores look larger can all be improved. What light therapy changes, and what it does not.
Read article
Buying Guide
7 articlesBuying Guide · 9 min
The Best LED Face Masks of 2025: A Buyer's Shortlist
The LED mask category exploded in 2024. Here are the five devices worth your money in 2025, ranked by dose, comfort, and value.
Read article
Buying Guide · 6 min
What "FDA-Cleared" Actually Means for an LED Mask
FDA clearance is meaningful, but it does not mean what most marketing copy implies. Here is the real story.
Read article
Buying Guide · 9 min
The Complete LED Face Mask Buying Guide for 2025
The eight specs that actually matter when buying an LED mask, and the marketing claims you can safely ignore.
Read article
Buying Guide · 7 min
Is an LED Mask Worth It? The Five-Year Cost Breakdown
A spreadsheet-style look at what at-home LED actually costs versus monthly spa visits over five years.
Read article
Buying Guide · 8 min
Which Radia Mask Is Right for You? An Honest Internal Comparison
Halo, Lumen, Noir, Sculpt or Solène — a straight comparison of every Radia device, including who should skip each one.
Read article
Buying Guide · 6 min
Buying an LED Mask as a Gift: A Short, Practical Guide
How to choose a light therapy device for someone else without guessing at their skin concerns — and how to avoid the obvious misfire.
Read article
Buying Guide · 7 min
Can You Use an FSA or HSA to Buy an LED Face Mask?
Whether light therapy devices qualify for pre-tax spending accounts, when a letter of medical necessity changes the answer, and how to ask without wasting a claim.
Read article
Not sure yet
Find the right device in sixty seconds
Four questions on concern, sensitivity and coverage — then one recommendation, including when the cheaper option is the better one.
Take the skin quiz →Support the Journal
We buy every mask we write about
No affiliate links, no paid placements, no brand approvals. Contributions keep the testing programme independent.
Contribute →