Brightness of 4500 lumens Enjoy maximum clarity and vibrant images even in daylight and from a distance (in medium to large rooms) thanks to the brightness of 4500 lumens. Acer ColorSafe II Enjoy consistent, natural colors with ColorSafe II technology, which controls dynamic RGB values and prevents color loss. Acer BlueLightShield Protect your eyes from excessive strain by using Acer BlueLightShield technology. Acer LumiSense Acer LumiSense adjusts the brightness and color saturation based on the content you are viewing. Acer ColorBoost3D Experience realistic colors and brilliant bright images with Acer ColorBoost3D technology.