The Lightmaster Solar Quartz movement is powered by photovoltaic energy ... Come nightfall, the watches remain illuminated via glow-in-the-dark Super-LumiNova-coated hands and indexes.

While the future direction of energy consumption may currently be up in the air, Swatch has elected to look to the sun for the latest addition to its Tissot brand, the PRC 100 Solar. Made for those ...