Image: Roof Tile Technology Ltd. The flat, dark grey, BiSolar tile has a power output of 18 W and efficiency of 17.5%, according to the manufacturer. “For each square meter, 9.7 tiles are needed ...
OSAKA--When the sun sets, signs made with a special tile material ... in-the-dark features are not lost by exposure to water or flames. It withstands wear, so it can be used in floor surfaces ...
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