LEDs on electronics need either a maximum brightness or an adjustable brightness. I have taken to covering the LEDs on charger bricks with Sharpie/tape (often multiple layers of tape) to dampen the brightness because I cannot function with these damn things at night.
I know you probably mean one of those serving-sized cereal boxes, but the mental image of you pulling out a family-sized box of cereal from some portal-to-Narnia pocket in your pants is fucking hilarious to me.