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The Knob Light by designer Jeong-Sun Park adds a new functional dimension to door knobs that will put an end to fumbling in the dark, trying to open the door on your way to the bathroom.
The Knob Light is essentially a door knob with an internal generator that stores energy. This energy is then used to illuminate at night, making it the perfect night light.
I like the idea of utilizing kinetic energy that would otherwise go to waste (opening and closing doors), but I have reservations about the fragility of the design and how comfortable it would feel in a hand grip. But this could be solved with a good choice of material for the ‘bulb.’