The quantity of board-mounted LEDs has increased significantly in recent years. For critical applications like automotive and architectural lighting, having the correct color, luminous flux, and every other parameter with the right value is becoming necessary; as a result, understanding how to test these types of boards has become more crucial. SPEA S.p.A. is a world's leading manufacturer of mechatronic systems for testing LED properties using a variety of sensors. Due to calibration inaccuracy or measurement instability, different sensors may produce different results. The aim of this thesis is to compare and contrast the behavior of two distinct sensors. Validating all of the gathered measurements involves the evaluation of the two sensors' stability and repeatability.