LightBulb

LightBulb is a desktop application designed to reduce eye strain by adjusting your monitor’s gamma and color temperature based on the time of day. As daylight fades into evening, LightBulb gradually transitions the display from cooler (blueish) tones to warmer (yellowish) tones, aiming to align your screen’s light with ambient lighting conditions and help lessen visual discomfort during late-night use. The tool is highly customizable, allowing users to define sunrise and sunset times manually or automatically via location, and tweak how the transition behaves. It runs with minimal performance overhead and does not require an internet connection to function. LightBulb also includes features such as a whitelist for applications sensitive to color changes and global hotkeys to adjust settings on the fly. Overall, LightBulb provides a flexible way to create a more eye-friendly computing experience, particularly for people who work long hours at their screens.