FAQ

Frequently Asked Questions

Have questions about light therapy? We’re here to help.

Whether you’re discovering light therapy for the first time, comparing technical specifications or choosing the right device for your routine, our frequently asked questions explain the essentials in clear, straightforward language.

From wavelengths and irradiance to treatment distance, usage safety, shipping and warranties, we want you to feel confident and informed before making your decision.

Still wondering about something? Contact our team at support@eternaglow.com.au. We’ll be happy to help.

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1. What is light therapy and how does it work?

Light therapy, also known as photobiomodulation, uses specific wavelengths of visible red and near-infrared light to interact with light-sensitive processes within the body.

Different wavelengths reach different depths. Red light is generally used closer to the skin’s surface, while near-infrared light can penetrate more deeply. These wavelengths are commonly studied for their potential to support cellular energy production, skin vitality, circulation and recovery.

Light therapy does not contain ultraviolet light and does not work by tanning or burning the skin.

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2. What is the difference between red and near-infrared light?

Red light is visible to the human eye and is commonly used in skincare and surface-level wellness routines. EternaGlow products may include wavelengths such as 630nm or 660nm, depending on the device.

Near-infrared light, including wavelengths such as 810nm, 830nm or 850nm, is largely invisible to the human eye and can reach deeper beneath the skin. It is commonly incorporated into devices designed for broader body, muscle and recovery-focused use.

The exact wavelengths included vary between products, so always check the Technical Details section on the individual product page.

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3. What does “nm” mean?

“Nm” stands for nanometres and is the unit used to measure the wavelength of light.

Each wavelength interacts with the body differently and reaches a different approximate depth. For example, 660nm red light is visible and commonly used for skin-focused applications, while 850nm near-infrared light is invisible and generally penetrates more deeply.

A higher nanometre number does not automatically mean a device is more powerful. Wavelength and power output are separate measurements.

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4. What is irradiance?

Irradiance measures how much light power reaches a particular area and is usually expressed in milliwatts per square centimetre, or mW/cm².

In simple terms, irradiance indicates the intensity of light reaching the treatment area. A higher irradiance can deliver more light energy in a shorter period, but higher is not automatically better for every device, treatment area or user.

Effective use depends on several factors, including wavelength, treatment distance, session duration, coverage and consistency.

Whenever verified irradiance information is available, EternaGlow displays it in the product’s Technical Details and explains the distance or testing conditions provided.

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5. Why does the irradiance measurement distance matter?

Irradiance generally decreases as the distance between the device and your body increases.

For example, a panel measured directly at the surface may produce a significantly different reading from the same panel measured at 15 centimetres. This is why an irradiance figure is most useful when its measurement distance is also provided.

Wearable devices, mats and sleeping bags are designed to sit directly against or very close to the body, while panels are generally used from a recommended distance. Always follow the instructions for your particular device.

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6. Does a higher irradiance mean a better device?

Not necessarily.

Irradiance is an important specification, but it should not be considered on its own. Wavelength accuracy, coverage, treatment distance, beam angle, LED configuration, session length, build quality and comfort can all influence the overall experience.

A very high irradiance may also require shorter treatment times. The most appropriate device is one that provides suitable wavelengths and coverage for its intended use, supported by clear and reliable specifications.

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7. What is light therapy dosage or energy density?

Light therapy dosage is commonly expressed in joules per square centimetre, or J/cm². It describes the total amount of light energy delivered to an area during a session.

Dosage is influenced by both irradiance and treatment time. This means a lower-powered device used for longer may deliver a similar total amount of energy to a higher-powered device used for a shorter session.

However, calculations can vary depending on the device, selected mode, distance and testing method. Follow the recommended session time for your specific EternaGlow product rather than relying on a general calculation.

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8. Why isn’t irradiance listed for every EternaGlow product?

EternaGlow only publishes technical specifications that have been provided or verified for the individual product.

Some manufacturers do not currently provide a reliable irradiance report or clearly state the conditions under which a measurement was taken. When this information is unavailable, we prefer to leave it out rather than publish an unsupported figure.

We are continuing to request more detailed testing information from our suppliers and will update individual product pages as additional verified data becomes available.

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9. Are the wavelengths and irradiance independently tested?

Testing documentation varies between products.

Where independent wavelength or irradiance testing has been completed and verified, this will be clearly stated on the individual product page. If a product page does not state that it has been independently tested, customers should not assume that independent verification has occurred.

EternaGlow is working toward expanding independent performance testing across future branded products.

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10. Is near-infrared light working even if I cannot see it?

Yes. Near-infrared light is largely outside the range visible to the human eye, so the relevant LEDs may appear dim or completely unlit even when operating correctly.

Some devices combine visible red and near-infrared wavelengths. In these products, you may only see the red LEDs illuminated, despite both wavelength types being active.

Do not look directly into the LEDs to check whether near-infrared light is operating.

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11. What is the difference between LED and laser light therapy?

LEDs generally disperse light across a wider area, making them well suited to masks, panels, mats and other devices designed for broad coverage.

Laser diodes produce a more concentrated and directional beam. The experience and output depend on the laser class, wavelength, power, optical design and intended application.

A greater number of lights does not automatically mean better performance. The type of diode, wavelength accuracy, irradiance, layout and coverage are also important.

Always follow the safety instructions supplied with any LED or laser-based device.

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12. What do pulse modes and different light modes mean?

Some devices offer continuous light, pulsed light or separate wavelength modes.

Continuous mode keeps the selected lights operating steadily throughout the session. Pulsed mode switches the light output on and off at a programmed rate. Devices with multiple wavelength modes may allow red light, near-infrared light or a combination of both to be selected.

Available modes vary between products. There is no single setting that is best for everyone, so begin with the product’s recommended settings and select the mode that feels most comfortable for your routine.

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13. Is light therapy safe?

Light therapy is generally well tolerated when an appropriately designed device is used according to its instructions.

EternaGlow devices are intended to be non-invasive and do not use ultraviolet light. However, users should follow the recommended treatment time, distance, eye-protection guidance and safety instructions for their specific product.

Stop using the device if you experience pain, burning, unexpected skin irritation, dizziness, visual discomfort or any other concerning reaction, and seek medical advice if necessary.

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14. Do I need to wear eye protection?

Eye-protection requirements vary depending on the device, wavelength, intensity and treatment area.

Use the supplied eye protection whenever the product instructions recommend it, particularly when using high-intensity panels or devices near the face. Keep your eyes closed during facial treatments and never stare directly into illuminated LEDs or laser diodes.

Appropriate eye protection is especially important when using blue light. If you have an existing eye condition, light sensitivity or concerns about ocular safety, consult a qualified healthcare professional before use.

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15. Can light therapy be used by all skin types and tones?

LED light therapy does not rely on ultraviolet radiation or abrasive chemicals and can generally be incorporated into routines across a wide range of skin types and tones.

However, individual sensitivity can vary. Begin with shorter or less frequent sessions if you have sensitive skin and monitor how your skin responds.

If you have a diagnosed skin condition, unusual skin sensitivity or are under the care of a dermatologist, seek professional advice before beginning a new light therapy routine.

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16. Who should speak with a healthcare professional before using light therapy?

Seek advice from a qualified healthcare professional before use if you:

  • Are pregnant or breastfeeding

  • Have epilepsy or a history of light-triggered seizures

  • Have a diagnosed photosensitivity condition

  • Have an active or suspected cancer

  • Have an implanted electronic device

  • Have a serious eye condition

  • Are receiving medical treatment for a skin condition

  • Have recently undergone surgery or a cosmetic procedure

  • Are taking medication or using skincare that may increase light sensitivity

  • Are uncertain whether light therapy is appropriate for your circumstances

Do not use a device over an active infection, unexplained lesion or open wound unless a healthcare professional has advised you to do so.

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17. Can medications or skincare products cause light sensitivity?

Yes. Certain medications, supplements and topical skincare ingredients can increase sensitivity to light.

Examples may include some antibiotics, acne medications, retinoids and other photosensitising products. This does not mean every product will react with every wavelength, but it is important to check the safety information supplied with your medication or skincare.

If a label warns of photosensitivity, or you are unsure, ask your doctor, pharmacist or dermatologist before using light therapy.

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18. How often should I use my light therapy device?

Usage recommendations depend on the device’s irradiance, wavelengths, treatment distance and intended application.

Many home-use routines involve sessions of approximately 10 to 20 minutes, three to five times per week. However, this is a general guide only and should not override the instructions supplied with your specific product.

Starting gradually can help you assess comfort and tolerance. More frequent or longer sessions do not necessarily produce faster or better results.

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19. How long does it take to notice results?

Light therapy is generally used as a consistent routine rather than a one-time treatment.

Some users may notice short-term changes in how their skin or body feels, while visible or longer-term changes may take several weeks of regular use. Results vary depending on the device, treatment area, consistency, lifestyle and individual response.

EternaGlow does not guarantee a particular outcome or timeframe.

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20. Can I use light therapy every day?

Some devices may be suitable for frequent use, but daily treatment is not necessary for every product or user.

Always follow the recommended session frequency for your specific device. Avoid repeatedly treating the same area beyond the recommended time, particularly when first introducing light therapy into your routine.

If your skin becomes unusually warm, irritated or uncomfortable, pause use and allow it to settle before considering another session.

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21. Should I use light therapy on clean skin?

For facial and skincare-focused devices, clean, dry skin generally allows the light to reach the treatment area without a heavy product layer acting as a barrier.

Unless the product instructions say otherwise, remove makeup and cleanse your skin before use. Skincare products can usually be applied after the session.

If you intend to apply a product before treatment, check that it does not contain photosensitising ingredients and is suitable for use with light therapy.

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22. Can I combine light therapy with my existing skincare routine?

Light therapy can generally complement a regular skincare routine.

A common approach is to cleanse and dry the skin, complete the light therapy session, and then apply serums or moisturisers. Avoid applying photosensitising ingredients before treatment unless your healthcare professional has confirmed that they are suitable.

If you use prescription skincare, chemical exfoliants or active ingredients such as retinoids, seek advice from your dermatologist or pharmacist.

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23. How do I choose the right EternaGlow device?

Consider the area you want to cover, your available space, your preferred treatment style and how easily the device will fit into your routine.

  • Masks and facial devices: Designed for convenient, targeted skincare routines

  • Gloves and wearable devices: Designed for close, targeted coverage of a particular body area

  • Panels: Versatile devices suitable for targeted or broader treatment from a recommended distance

  • Mats and sleeping bags: Designed for convenient, large-area or full-body coverage

Compare the wavelengths, verified irradiance, dimensions, treatment distance and usage instructions listed on each product page. If you are still unsure, contact us at support@eternaglow.com.au for guidance.

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24. Do EternaGlow devices produce heat?

Light therapy and heat therapy are not the same thing.

Some light therapy devices may feel mildly warm during operation due to the LEDs and internal electronics. Other products may include a separate, intentional heating function. If heat is included, it will be clearly listed in the product description.

A device should not cause burning or painful heat. Stop use and disconnect the product if it becomes excessively hot, develops an unusual smell or appears damaged.

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25. How should I care for and clean my device?

Turn off and unplug the device before cleaning unless the product instructions state otherwise.

Use a soft, lightly damp cloth and avoid abrasive cleaners, harsh chemicals or excessive moisture. Do not immerse electrical components in water. Wearable or skin-contact products should be cleaned according to their individual care instructions after each use.

Allow the device to dry completely before storing it in a cool, dry location. Avoid tightly folding products unless they are specifically designed to be folded.

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26. Where is EternaGlow based?

EternaGlow is proudly based in Adelaide, South Australia.

Our business and customer support operate locally, while many of our current products are sourced from selected international manufacturers and may be dispatched directly from an international fulfilment location.

As EternaGlow grows, our goal is to expand our range of independently tested, Australian-designed and EternaGlow-branded products while bringing more stock and fulfilment closer to home.

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27. How long does shipping take?

Orders are generally processed within one to three business days.

Estimated delivery within Australia is approximately:

  • Standard metropolitan delivery: 7–14 business days

  • Remote or rural delivery: 10–20 business days

Delivery times are estimates and may be affected by the destination, carrier delays, public holidays, customs processing or circumstances outside our control.

Some products may be shipped separately if they are dispatched from different fulfilment locations. Please review the individual product page and Shipping Policy before ordering.

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28. How can I track my order?

Once your order has been processed and dispatched, you will receive an email containing your tracking information.

Tracking may take several days to display its first update after the shipping label is created. If you have not received your tracking details, check your junk or spam folder before contacting support@eternaglow.com.au.

If your order contains multiple products, you may receive more than one tracking number.

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29. What happens if my order is delayed or does not arrive?

If your parcel has passed its estimated delivery window or tracking has not updated for an extended period, contact us at support@eternaglow.com.au.

We will review the tracking information and, where appropriate, open an enquiry with the carrier or fulfilment provider. If the parcel is confirmed lost, we will arrange an appropriate resolution in accordance with our Shipping Policy and your rights under Australian Consumer Law.

Please ensure your delivery address is complete and accurate before placing your order.

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30. What should I do if my item arrives damaged or faulty?

Please contact support@eternaglow.com.au as soon as possible, preferably within seven days of delivery.

Include your order number, a description of the issue and clear photographs or video showing the product, packaging and fault. This helps us assess the issue and arrange the appropriate next step.

Depending on the nature of the problem, the resolution may include troubleshooting, repair, replacement or refund. Nothing in this policy limits your rights under Australian Consumer Law.

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31. Do you offer a warranty?

Most EternaGlow electrical products include a 12-month limited warranty from the date of purchase, unless a different warranty period is stated on the individual product page.

The warranty generally covers manufacturing defects and faults arising during normal, intended use. It does not cover accidental damage, misuse, unauthorised modifications, improper storage, normal wear and tear or failure to follow the supplied instructions.

This warranty is provided in addition to any rights and remedies available under Australian Consumer Law.

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32. What is your return and refund policy?

Eligible unused products may be returned for change of mind within 15 days, subject to the conditions in our Returns & Refunds Policy.

For health and hygiene reasons, opened or used personal-care and skin-contact products cannot generally be returned for change of mind. This may include facial masks, cleansing devices and other products that come into direct contact with the skin.

Hygiene exclusions do not remove your rights if an item is faulty, unsafe, damaged, incorrectly supplied or does not match its description. Please contact support@eternaglow.com.au if you experience a problem with your order.

All approved change-of-mind returns must be unused, in their original packaging and accompanied by proof of purchase.

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33. What payment methods do you accept?

EternaGlow accepts major payment methods displayed at checkout, which may include Visa, Mastercard, American Express, PayPal, Afterpay and Apple Pay.

Available payment options can vary depending on your device and checkout location. Please refer to the payment options shown at checkout for the most current information.

Zip Pay is coming soon.

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Important Information

EternaGlow light therapy products are intended as general wellness devices unless expressly stated otherwise. They are not intended to diagnose, treat, cure or prevent any disease or medical condition.

Information provided on this page is general and educational in nature and is not a substitute for personalised medical advice. If you have a medical condition, take prescription medication, experience photosensitivity or are unsure whether a product is suitable for you, consult a qualified healthcare professional before use.

Individual experiences and results may vary. Always read and follow the instructions supplied with your specific device.