Ultraviolet light source for use in an environment for human occupation including hardware safety interlocks

A disinfection light source comprising:

• one or more disinfection light emitters comprising LEDs configured to emit ultraviolet light;
• and
• electronics configured to conduct electric power received by the electronics to the one or more disinfection light emitters to drive the one or more disinfection light sources to emit ultraviolet light, the electronics including a safety interlock circuit that includes:
• an ammeter connected to measure electric current flowing through the one or more disinfection light emitters;
• a comparator connected to compare the electric current measured by the ammeter with an electrical reference value;
• a timer circuit configured to run over a delay interval while the comparator indicates the electric current measured by the ammeter exceeds the electrical reference value and to stop running and reset if the comparator ceases to indicate the electric current measured by the ammeter exceeds the electrical reference value;
• and
• a switch connected to interrupt the conduction of the electric power to the one or more disinfection light emitters in response to the running timer circuit completing the delay interval.