What is the life of the light on the HD-HMI. I'm thinking that 2- years continuous on, is too long, and I need to switch it on and off as needed. Use one of the Function keys to turn on, and a PLC timer to turn it off utilizing one of the output terminals.
Also has anyone done a dimmer using a photo cell and one of DAC's, but I don't have an ADC available, they are all in use.