A new AOCS called “High Precision Attitude and Orbit Control System Based on the Emission of Electromagnetic Radiation” (PACER) is currently under development at the Institute of Space Systems (IRS) of the University of Stuttgart. This thesis deals a new high precision thrust balance in the sub micro-Newton range, with a new concept of active damping system, based on the emission of electromagnetic waves. The chosen radiation source are LEDs because of the low thermal radiation component, the low energy consumption and the continuous improvement of this technology in recent years. Goal of this project will be the measurement of the light pressure emitted by LEDs, to evaluate a possible use of these technology for the PACER.