As for guiding on what the "if light is in the lb.16 system" means in the context of the "Proton ELIC" program for Windows, and when it lights up, I would need more specific information about the program. Without additional context or documentation on "Proton ELIC" and the "lb.16 system," it’s challenging to provide a precise answer. Typically, "light" may refer to an indicator within software that alerts the user of a specific status or event. You might need to refer to the user manual or software documentation for Proton ELIC for detailed information.