US Patent 10441809 Tunable white light source with variable UV component

The invention provides a lighting system (10) comprising a first light source (100), a second light source (200) and a control system (20) configured to control the first light source (100) and the second light source (200), wherein: —the first light source (100) is configured to provide first light source light (101) comprising: (i) a UV component; and (ii) (iia) a blue component or (iib) a blue component and a yellow component; —the second light source (200) is configured to provide white second light source light (201) having a second light source light correlated color temperature (Tc2); —the lighting system (10) is configured to provide lighting system light (11) comprising one or more of said first light source light (101) and said second light source light (201), with the lighting system light (11) having a controllable correlated color temperature (Tc).