What is Blue Light? Blue light is a portion of the visible light spectrum (380 to 500 nanometers) contained in sunlight and common electronic devices, like computer screens and smartphones. Because of its high energy, blue light penetrates more easily into the dermis of our skin as compared to other wavelengths that have lower energy. Does Blue Light Damage Skin? Blue light can harm your skin and disrupt the circadian rhythm (sleep-wake cycle). Recent studies have also established that blue light could accelerate premature ageing, skin pigmentation, wrinkles, cataracts and related eye complications, among others. The unstable molecules generated when blue light penetrates our skin damage our skin cells, resulting in faster ageing brought about by the breakdown of collagen and elastin. Blue light has also been found to increase the amount of DNA damage.