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.
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
5 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.
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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.
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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?
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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.
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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.
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The Science
8 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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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How To
8 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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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Buying Guide
4 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.
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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.
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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.
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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.
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