SILENCE is a Visible Light Communication (VLC) System test-bed using the Software Defined Radio (SDR) concept. Next generation illumination systems will be based on LED technology due to its appealing characteristics in terms of energy efficiency and life expectancy. Nevertheless, these illumination devices can be used for a complementary purpose, data transmission. Motivated by this, CTTC has built SILENCE test-bed, one of the world’s first VLC prototype featuring a communication link based on the standard IEEE 802.15.7. The use of SDR techniques provides SILENCE with enough flexibility to rapidly cope with future enhancements.