A red light therapy panel with adjustable stand against a bright porcelain backdrop

What Is Red Light Therapy? A Beginner's Guide

7 min read

Red light therapy is the practice of sitting or resting near an LED device that emits visible red light — usually around 660 nanometers — and often near-infrared light around 850 nanometers. Sessions are short, quiet, and screen-free: typically 10 to 20 minutes with a panel, mask, wrap, or handheld device.

660 nm
visible red light
850 nm
near-infrared, barely visible
10–20 min
a typical session
4
main device formats

If you have seen that warm red glow in a wellness studio, or on a friend's nightstand, and wondered what is actually going on, this guide covers the basics: what the devices are, how the main types differ, and what a session looks like. No jargon, and no big promises — just how these devices work and how people use them.

How a red light device works

A red light device is an array of LEDs tuned to specific wavelengths. Most combine visible red light (around 630 to 660nm) with near-infrared light (around 850nm), which sits at the edge of what the eye can see. The size of the array determines how much area the glow covers.

A wavelength is simply the "color" of the light, measured in nanometers (nm). Light at 660nm reads as a deep, warm red. Near-infrared at 850nm is barely visible — on many devices those LEDs look switched off, or show only a faint glow, even when they are running.

Where device wavelengths sit on the light spectrum Where device wavelengths sit on the light spectrum red 630–660nm near-infrared 850nm 400500600700800900 nm visible light beyond what the eye sees — NIR LEDs look dim while running
Dim LEDs are not broken LEDs. Near-infrared at 850nm sits past what the human eye registers, so working NIR chips often show only a faint glow — or nothing at all — while the red chips shine clearly.

One detail worth knowing when you read spec sheets: a single LED bead can house more than one chip. Our Rubalume Belt Wrap, for example, uses 105 tri-chip beads — each bead carries a red chip plus 2 near-infrared chips. Manufacturers sometimes quote beads and sometimes quote chips, which is why 2 devices with "the same number of LEDs" can look very different up close.

Inside 1 tri-chip LED bead Inside 1 tri-chip LED bead 1 red chip (660nm) — glows bright 2 near-infrared chips (850nm) — look dim while running 105 beads × 3 chips = 315 emitters the math behind our Belt Wrap's spec sheet

The 4 main types of red light devices

Red light devices come in 4 broad formats: panels, masks, belts and wearables, and handhelds or flexible pads. They all emit the same kind of light — the difference is coverage, fit, and where the device lives in your home.

Panel Panels Largest coverage, used from a short distance. Lives on a stand in a dedicated corner.
Mask Masks Shaped for the face, often cordless with a short auto timer. Vanity or nightstand.
Belts and wearables Belts & wearables Flexible strips that strap on and run hands-free while you read or move around.
Handhelds and pads Handhelds & pads Small and targeted, or a padded sheet that curves over face, neck, or back.

A red light therapy panel on its floor stand, angled over a person seated on the floor of a bright, porcelain-toned room

Panels

Panels are the largest format: a rigid array of LEDs, usually on a stand or hung in place, used from a short distance. They cover the most area in a single session. Our Red Light Therapy Panel carries 432 LEDs at 660nm and 850nm on an adjustable floor stand, with a wireless remote and a 5-to-30-minute timer. Browse the format in our Full Body collection.

Masks

Masks are shaped to rest on the face — many, like our Red Light Therapy Mask for Face and Neck, are made of flexible silicone, run cordless on a built-in battery, and switch off on a 10-minute timer. Ours has 103 LED beads and an RGB 3-chip array that produces 7 colors, red included. See the Face & Neck collection for this format.

Belts, wraps, and wearables

Belts and wraps are flexible strips of LEDs that strap around the body and run hands-free — our Belt Wrap packs its 105 tri-chip beads into a wrap you can wear while reading. Wearables push the idea further: our LED Scalp Cap (97 diodes) is worn like a regular cap. Both live in the Wraps & Wearables collection.

Handhelds and flexible pads

Handhelds are small, targeted devices you move where you want them — our 3-in-1 Facial and Neck Device combines a red LED mode with vibration and ion care in a single wand. Flexible pads split the difference between a panel and a wrap: our Flexible Pad carries 720 LEDs (630nm and 850nm, plus amber and blue modes) in a padded sheet that curves over the face, neck, or back.

What a red light session looks like

A typical session lasts 10 to 20 minutes. You set the device's timer, settle in — reading, stretching, an evening skincare ritual, or nothing at all — and let the device switch itself off. Panels are used from a short distance; masks, belts, and pads rest directly where you place them.

A session in 3 steps 123 Set the timerSettle in, 10–20 minIt switches itself off position per your manualread, stretch, or do nothingthat is the session done

Most people fold sessions into a routine they already have: the last chapter of a book, the quiet 10 minutes after the dishes are done. The glow is warm and dim enough to make a room feel calmer, which is a big part of why the habit sticks.

Two practical notes. A large panel is bright — don't stare into the LEDs, and if your device includes eyewear, wear it. And LEDs give off mild warmth, not sauna-style heat; a device that gets genuinely hot needs checking against its manual. Our session guide covers timing, positioning, and care in detail.

A calm, warmly lit bedroom in soft porcelain and amber tones — the kind of quiet corner where an evening session happens

How to choose your first device

Choosing a device is mostly a question of where the ritual will happen. A dedicated corner with an outlet suits a panel; a vanity or nightstand suits a mask or handheld; the sofa suits a belt or pad. From there, compare published specs — wavelengths, LED counts, timers, power source — rather than marketing adjectives.

Where will the ritual happen? Start with where the ritual will happen A corner with an outlet A vanity or nightstand The sofa Panel Mask or handheld Belt or pad

We wrote 2 companion guides for exactly this decision: mask vs panel, compared side by side, and a buying guide to the 7 specs worth comparing. When the box arrives, the home setup guide takes it from there.

Frequently asked questions

Is red light the same as infrared?

No. Red light (around 630 to 660nm) is visible; near-infrared (around 850nm) sits just beyond what the eye can see. Most modern devices combine both in the same array, and reputable makers publish which wavelengths their device emits.

Do red light devices produce heat?

LEDs run warm, not hot. A red light device is not a heat lamp or a sauna — expect the gentle warmth of electronics and light, noticeable but mild. Devices with batteries or dense arrays may feel warmer after a full session.

How long is a session?

Most built-in timers run 5 to 30 minutes, and the manual for each device states its maker's suggested session length. Our mask, for instance, switches itself off after 10 minutes; our panel's timer adjusts from 5 to 30 minutes by remote.

Why do some LEDs on my device look switched off?

Those are almost certainly the near-infrared LEDs. Light at 850nm is barely visible to the human eye, so working NIR chips can show only a faint glow — or nothing at all — while the red chips shine clearly.

Keep reading

Compare Mask vs panel: which fits your routine? Shop smart Buying guide: the 7 specs worth comparing Set up Red light therapy at home, room by room Use it well Sessions, timing, and device care

Rubalume devices are wellness devices, not medical devices. Our guides describe what the devices are and how they are used. For the formal details, see our Wellness Disclaimer.

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