Our NightFall range is the most powerful and premium lens available. These block 100% of blue light along with 100% of green light up to 550nm. So why block green light? Isn’t blocking blue light enough? Well, academic studies show it’s not just blue light that’s the problem; green is right next to blue in the colour spectrum, and the science clearly shows the melatonin disruption range also extends into the green light spectrum up to 550nm. This means blocking both blue and green light has a more powerful effect and ensures your getting the maximum benefits from mitigating artificial light.