Smartphones are ubiquitous in everybody’s daily lives. A key component of the smartphone is the camera, which has gained market share over Digital Still Cameras due to its convenience. The major factors contributing to the quality of a picture where lighting plays a role are signal to noise ratio and colour reproduction. Once the signal to noise ratio is sufficient, colour reproduction optimization is the most critical. When a flash is used, the spectrum of the LED can be tuned. This white paper addresses how to best tune the spectrum of an LED used in a camera flash module.