How Natural Light Powers Your Body from the Inside Out

Energy fuels your internal bodily functions—it helps build, repair, and maintain cells and tissues—that support our external activities.Natural light is a vital source of energy. Just like plants, our body absorbs light and converts it to energy.

The following information is research available online from peer-reviewed publications on light energy for various health applications. Joylux offers several light-based devices with each device having a different application, FDA regulatory clearance, and approved claims. Please refer to each individual device in Shop for their specific application, clearance and approved claims.

Power Matters—Which is Why We Deliver More

Not all red light devices are created equal. For red light to be effective, it must deliver enough energy over time—not just emit a red glow. Joylux devices are engineered to deliver the highest energy output available in a home-use red light device, measured in joules per square centimeter (J/cm²). This measurement reflects the total amount of light energy delivered to the body and it’s a key factor in whether red light technology can meaningfully support the body’s natural processes.

More than Meets the Eye

Power, energy, and wavelength all play a role in effective red light design. Irradiance (the intensity of light delivered) determines how much light reaches the body, while joules per square centimeter (J/cm²) measure the total energy delivered over time. Joylux devices are engineered to deliver higher irradiance and total energy than other home-use devices, using carefully selected wavelengths, ensuring meaningful light delivery while remaining appropriate for at-home use.

Wavelength defines the type of light.
Irradiance defines its strength.
Joules/cm² define how much energy is delivered.

You don’t just want any red light—you want the right light, delivered with the right power.

The Research

We are committed to delivering products that safely deliver exceptional results. Our numerous clinical studies on our portfolio of LED devices have been peer reviewed and published in prestigious medical journals. (Clearances and claims vary by device.)Light is a wide spectrum encompassing many wavelengths and colors. For decades it has been researched by scientists who discovered that light in a narrow band of red and near infrared can safely produce health benefits.

The authors of thousands of published peer-reviewed papers believe that this band of light stimulates the mitochondria in your cells to create the energy we need.1

How Red Light Works

It is believed that mitochondria, in their excited state, release ATP (adenosine triphosphate) and NO (Nitric Oxide). Increased ATP means more energy to build collagen and repair tissue. Increased NO means improved blood flow, which helps the necessary nutrients and oxygen travel throughout our body.

Dive deep into the science with one of our favorite published studies on red light.1 Since its discovery, light energy is now being used in a variety of health applications—from wrinkle reduction, hair growth, and wound healing to a reduction of pain and inflammation, as well as an improvement in vaginal wellness and vaginal/perineal recovery after childbirth.

Red Light Therapy 101: How It Works and Why Your Body Loves It

Not All Light is Created Equal

Red light therapy isn’t just about turning on a light- it’s about using the right light, in the right way.

Our devices operate at 662 nanometers (nm) because research shows this specific wavelength is where red light performs at its best. In simple terms, this wavelength is able to penetrate the tissue effectively and communicate with your cells, encouraging them to function better and repair themselves more efficiently. Think of it as tuning into the exact frequency your body understands and responds to.

But wavelength is just the beginning. For red light to work, it has to be delivered with the correct dose and timing.

Wavelength – the type of light. We use an exact parameter that has been shown to be most effective.
Energy density & fluence – how much total light energy your body receives. Too little does nothing. Too much isn’t better.
Irradiance – how strong the light is at the skin’s surface.
Session time & repetition – how long and how often you use it to see real benefits.

If any one of these is off, the results can be ineffective.

That’s why our team of scientists and engineers spent years testing, refining, and optimizing every single parameter. We didn’t just design a device that emits red light—we engineered one that delivers the ideal amount of light, at the ideal strength, for the ideal amount of time, all while remaining safe, gentle, and easy to use at home.

We’ve done the hard work so you can simply press a button and feel confident you’re getting meaningful results. At the end of the day, we love red light because it works. And because it’s helping women feel better in their bodies, more confident in their skin, and more empowered in their health.

That’s light, done right.

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