Radion - Green Light

[Seriak]

So I was sleeping soundly until my dog starts whining to go outside. So I get up and head downstairs and I notice at 12:45am that one of my Radions is on and it's all green. I say to myself that is weird as they were all off at 10:00PM like they were supposed to be. I am on the standard natural light setting. When I manually shifted the lights to artificial and back to natural the light went out, but why was it on in the first place. Anyone else experience this?