These are lighted switches Cimmorene (sitori6) and I put in to replace the small rocker-style switches near the front door. Actually, these are both supposed to light up, but I have achieved my purpose.
The right switch turns on the outside light mounted on the house; we turn this light on at dusk (and it is turned on). The left switch turns on the overhead light in the entryway. I wanted at least the left switch to be lighted so we could see it entering into an otherwise dark house after sunset.
This took three tries and many phone calls to get the configuration just right.