For the traditional switch, it cuts off the power by disconnecting the copper wire. For electronic switch, it cuts off the power by relay / triac. This means, the electrical circuit is still complete. Therefore, by special design, we can steal power from the “standby” mode to support our MCU.
For our switch, we tested with over 100 different types bulbs including LED, Power saving lamps, Fluorescent lamps, etc, mainly with 5w above and we can support 90% of the tested bulbs without flickering. For those lamps have flickering problem, we provide extra component to make it compatible as well.