The healthy light spectrum

Research has shown that pupil size is controlled by non-visual photoreceptor cells on the retina. These special ganglion cells are sensitive to light-blue light and play an important role in regulating pupil size, independent of our conscious vision. The response curve of these ganglion cells shows a maximum at 490 nm (nanometres), which is in the blue range of the light spectrum. In conventional LEDs with a colour rendering index Ra>80 and Ra>90, the emission in the light blue range is low. Despite the high blue component at 450 nm, our eyes do not perceive a high level of brightness as the sensitivity is at 490 nm. This causes the pupil to dilate and more light to fall on the retina. Especially short-wave blue light (450 nm) is perceived as blinding or "piercing" light. High doses of this short-wave light can lead to fatigue and eyestrain. This is precisely where XPRCTRUM LEDs come into their own. A spectral wavelength distribution that is in line with nature considers the sensitivity of the human eye. Therefore, there is no excessive strain and we also refer to the “healthy light spectrum” of XPECTRUM luminaires. The colour fidelity is rated Ra 98, which is expressed as a natural colour effect and colour saturation. No colours appear over- or undersaturated. In contrast to Ra>80 and Ra>90 light quality, full-spectrum light appears calm and pleasant. Overall, XPECTRUM LEDs aim to produce eye-friendly light that increases the ability to focus and improves well-being.