Need more light? As an alternative to a traditional lamp, consider the Ecovolt concept by designer Kim Joonhyun: a solar-powered mobile lighting device that attaches to a window by day and lights up wherever you need it at night.
According to Green Diary, the Ecovolt is composed of a flexible material that gives you the freedom to place it wherever needed. There’s a light panel at the front, a solar collector at the back, and and an adhesive silicon that connects the two–along with a rope attached to a remote control that allows users to switch the light on and off, control the strength of the light, and gauge how much juice it has left.
The designer notes that the Ecovolt could be used in a number of different contexts. Reading a book in bed at night? Roll the Ecovolt and attach it to the wall behind you. Need to light a larger area? Lay it out flat and stick to the ceiling or hang it from a wall hook–all without attaching a plug.