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Night-time bottle lights are made up of :
. . . . . . a simple circuit, a battery,
. . . . . . 4 LED lights,
. . . . . . some plastic tubing,
. . . . . . a small solar panel, and
. . . . . . the bottle itself.
The LEDs are housed inside the protective bottle, with the solar panel screwed into the top.
. . . The 3-watt lights provide enough brightness to light a 15sq m room.
. . . The circuits are cleverly designed,
. . . . . . so that they automatically switch on and off in the presence or absence of daylight.
With the addition of a 10ft PVC pipe, or pole, made from bamboo or wood,
. . . the device can be transformed into a streetlight.
More importantly, all the components are open-sourced, and
. . . can be built from scratch, even down to the circuit itself,
. . . the instructions for which can be found online
01-22-2015 Source: Liter of Light At Night
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