The effectiveness of a red light device depends heavily on the wavelengths used. Red and near-infrared (NIR) light are the most commonly used wavelengths because they penetrate deep into the skin and tissue. Red light typically ranges from 620 to 750 nanometers, while NIR light ranges from 750 to 1200 nanometers. However, this doesn't mean that all of these wavelengths are actually beneficial. Research has shown that wavelengths between 630 nm and 680 nm, as well as between 800 nm and 880 nm, are the most effective. These specific wavelengths were chosen because they effectively support cell function and promote healing.

Irradiance measures the power of light striking a given area and is measured in milliwatts per square centimeter (mW/cm²). Higher irradiance means more energy penetrates the cells, thus enhancing the therapeutic effect. A good red light device should provide a consistent and sufficiently high irradiance to achieve the desired health benefits. It is recommended to choose a device that delivers at least 30 mW/cm² and ideally around 100 mW/cm² (9 for close irradiation at approximately 15 cm).

The use of electrical devices can generate electromagnetic fields (EMF) that may be potentially harmful to health. High-quality red light therapy devices are designed to minimize EMF emissions and ensure that the therapy remains free from unwanted electromagnetic influences. It is important to choose devices that guarantee low EMF levels.

The correct dosage is crucial for the effectiveness of red light therapy. Dosage refers to the amount of light energy transferred to the body and depends on the intensity and duration of the treatment. Too much or too little light can compromise the desired results. Therefore, it is important to follow the recommended treatment times and intensities to achieve the best results.

The beam angle determines how widely the device's light is distributed. A wider beam angle allows for the simultaneous treatment of larger areas of the body, while a narrower beam angle enables a more intensive and focused treatment. Choosing the correct beam angle depends on the specific therapeutic needs and the body areas to be treated.

There is a debate about whether pulsed light is beneficial in red light therapy. Some manufacturers claim that pulsed light can enhance cell stimulation and the therapeutic effect. However, recent studies have shown that continuous light is just as effective, if not more so. Pulsed light offers no significant advantages over continuous light, and the additional technical requirements often make it unnecessarily complicated and more expensive without providing any added benefit.

Using a red light panel as ambient light can offer several health benefits, such as regulating the circadian rhythm, improving mood and relaxation, and reducing eye strain. Red light supports a healthy sleep cycle because, unlike blue light, it does not suppress melatonin production. It creates a calming environment that helps reduce stress and promote relaxation. Additionally, red light is gentler on the eyes and reduces strain, making it an ideal lighting option for evening activities. Properly integrating red light into your lighting concept can therefore create a comfortable and health-promoting environment.