Solar Brick
Grab a bunch of light emitting diodes (LEDs) connect them to some solar panels and wrap them in some tough polycarbonate plastic and you get Solarbricks. Can be used like pavers in the ground, allowing 2 tonne trucks to drive over them. Or place them vertically in posts. 6 colours, 2 sizes and a variety of shapes. If given 1 hour of direct sunlight, they will illuminate a pathway for about 3 nights or 12 hours, automatically turning on as darkness approaches. Under conditions of cloud, rain or shade 6-8 hours is required for a full charge. A maintenance free life of about 10 years is forecast.
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