... IP66 Waterproof solar street light controller1, 8h, 4h, 2h, 1h, LED indicator light by water means that the controller is ... solar cells for battery charging that the entire solar street lighting system was normal.When the second work period set 0h (h), the controller ... work in the water and harsh environments. Suitable for humid air areas.II: Optical coupling technology, the controller can be applied ...