Light-emitting diodes, more popularly known as LEDs, create light when an electrical current passes through the bulb. More importantly, LEDs are able to give off a bright, fresh illumination similar to natural daylight. A CRI (color rendering index) measures how colors look under a false light source compared to how it looks under natural sunlight. It runs on a scale from zero to 100, and we’re happy to share that our LEDs have a CRI measurement of 85. That's pretty great!