| 1 | Verify the light specifications | Look for clearly stated wavelengths, irradiance, treatment time, and operating modes. Avoid products that only describe the LEDs as “powerful” without measurements. | Commonly marketed red-light ranges are approximately 620–660 nm; near-infrared modes are often approximately 810–850 nm. Irradiance should be reported in mW/cm² at the skin, not only as total LED wattage. | Are wavelength and irradiance values independently tested? Is the measurement distance specified? Does the manual state the recommended session length? |
| 2 | Check electrical and eye-safety features | Review electrical certification, overheating protection, automatic shut-off, cable quality, and eye-protection instructions. Blue-light modes require particular attention to eye comfort and safety guidance. | A timer or automatic shut-off helps prevent unintended prolonged exposure. Regulatory markings should be verifiable for the market where the device is sold; a marking alone does not prove treatment effectiveness. | Does the device include suitable eye shields or clearly explain when they are required? What happens if the mask becomes unusually hot? Is there a documented safety standard or test report? |
| 3 | Assess facial fit and comfort | Choose an adjustable design with stable straps, smooth edges, adequate nose clearance, and even contact or coverage across the intended treatment area. | A comfortable mask should remain in position during the full session without creating painful pressure points, obstructing breathing, or sharply bending near the eyes and nose. | Is the mask suitable for your face shape and head size? Can the straps be adjusted independently? Are the eye openings aligned without pressing on the eyelids? |
| 4 | Evaluate treatment controls | Prefer simple controls for selecting light modes, setting session duration, and stopping treatment immediately. A visible countdown can make routine use easier. | The control panel should state whether modes run separately or simultaneously and whether the timer resets automatically between sessions. | Can the device be operated without a smartphone? Is the treatment time easy to confirm? Can you stop the session with one button? |
| 5 | Consider power and portability | Compare rechargeable, plug-in, and USB-powered designs. Check charging time, battery capacity, cable length, and whether the mask can be used while seated or moving lightly. | Battery runtime depends on LED power, selected mode, and battery condition. Look for runtime stated in completed treatment sessions rather than only battery capacity in mAh. | How many full sessions are available per charge? Can the device be used while charging? Is the charger rated for your local voltage and plug type? |
| 6 | Check cleaning and maintenance requirements | Select a mask with smooth, wipeable surfaces and removable components where appropriate. Confirm which cleaning products are allowed and whether the device is water-resistant. | Do not immerse an electrical mask unless the manufacturer explicitly states that it is waterproof. Cleaning instructions should distinguish between the mask surface, eye shields, straps, and controller. | Can the areas touching the skin be disinfected without damaging the material? Are replacement straps, eye shields, or cables available? |
| 7 | Review skin compatibility and support | Read the contraindications, warnings, return policy, warranty, and user instructions. People using photosensitizing medicines or with light-sensitive conditions should seek medical advice before use. | LED phototherapy is non-ionizing light, but temporary redness, warmth, dryness, or irritation can occur. Stop use and seek professional advice if a severe or persistent reaction develops. | Are precautions written clearly? Is customer support available for safety questions? Does the warranty cover the controller, battery, LEDs, and charging equipment? |