Here is another UVC light that kills the majority of germs on your desk. The Targus UV-C LED Disinfection Light can cover your keyboard and mouse. It turns on 5 minutes every hour to get the job done. It has an auto shut-off safety feature that uses motion sensors.
The Targus UV-C LED Disinfection Light works automatically and requires virtually no maintenance. It has a manual cleaning mode too. You can find out more about it here.