... Ÿ V-Detector Technology (VDT). The VDT makes our solar lighting system will have TWO times of rainy day backup than the ... will, at its option, repair or replace any SOKOYO’s system that is defective for a minimum of two (2) ... equipments like powder Spray Machine, Pressure Machine, Integrating Sphere, Lighting Simulating Machine, and Weather-ability Testing Machines, etc.. 10A solar system controller