The Smartwares SH4-90158 light sensor operates at FSK 433 MHz frequency. This device is ideal for automating lighting systems based on ambient light conditions. Typical applications include controlling garden or outdoor lights to improve energy efficiency. https://elecena.pl/product/28706012/smartwares-sh4-90158-fsk-433-mhz-light-sensor-automatically-switches-on-lighting 2025-05-16 https://elecena.pl/product/28706012/smartwares-sh4-90158-fsk-433-mhz-light-sensor-automatically-switches-on-lighting 2026-09-11