A2Lights out, one source left
Even overheads → one warm pool
Fridge glow → flat overhead fluorescent
A1

Medium shot of a middle-aged Filipino dad in pajamas eating cake from an open fridge in a dark kitchen at midnight, photoreal comedy, locked camera. 0–2s: only the cold glow of the fridge light lights his face as he takes a huge bite. 2–4s: the overhead lights snap on with a flicker. 4–6s: flat, bright fluorescent light floods the kitchen, revealing frosting on his chin, the counter and the floor. 6–8s: he freezes mid-chew and slowly looks toward the light switch out of frame. Throughout: high-key light after the switch, white cabinets, upper body in frame, fixed camera, one continuous take.
Light can be the punchline. A flat overhead reveal exposes everything the dark was hiding, so put the evidence in the frame.
Same light, other genre: Lights on, thriller version
Pairs with: Guilt · Embarrassment · Disbelief
A2Even overheads → one warm pool
A3Clean white → pulsing crimson
A4Steady green → stutter → dryer glow