[sub]You know how something dumb will bother you because you can’t figure it out, but you know you’ll feel stupid asking? This is one of those questions. [/sub]
I have a white noise machine with a clock. The clock’s face flips up to reveal the on/off button and other various buttons, then can be flipped back down if I chose not to use it as a clock. The face is lit with green light. There isn’t a button sort of trigger (like the fridge door has) to turn the light off. Is there a way to figure out, short of dismantling it, if the light is always on, or if it’s only on when it’s at least partially open?
Well, I guess you should look really carefully for a trigger of some kind on the clock, like there is in the fridge. (If you haven’t already) Also, you could hold it open just a little bit, with some thin item, like a pencil. Then look inside to see if there’s a light. Or maybe you could get some technical details from the manufacturer if you really wanted to.
Get a strand of optical fibre off a light an angel or snowman statue from Walgreens. Feed it into the opening as you close the door. See if it remains lit up.