Maximize uptime and enhance driver safety with the STANDARD IGNITION EFL166~SI 2-Terminal Ambient Light Sensor. For over 100 years, STANDARD IGNITION has been the go-to supplier for professional technicians, providing high-quality, reliable parts that meet or exceed OE specifications. The EFL166~SI is no exception. This critical sensor ensures your fleet vehicles automatically adjust headlights and interior lighting based on surrounding light levels. This feature improves driver visibility in low-light conditions, reducing the risk of accidents and enhancing overall safety. Built with precision manufacturing and multiple layers of testing, the EFL166~SI offers superior durability and performance, minimizing downtime due to sensor failure. Its simple 2-terminal design ensures straightforward installation, reducing labor costs and maximizing your fleet's efficiency. Investing in the STANDARD IGNITION EFL166~SI translates directly to increased safety, improved operational efficiency, and reduced maintenance expenses for your fleet. Don't compromise on quality – choose a sensor that performs as reliably as your drivers. Choose STANDARD IGNITION.