SPECIAL ORDER ITEM. Review Returns Policy before purchase. The Satco Add-on Photocell is a light-sensing control accessory designed to automatically turn lighting on and off based on ambient light levels. It enhances energy efficiency by ensuring lights operate only when needed. This photocell is ideal for outdoor and security lighting applications where dusk-to-dawn control is required. Designed for compatibility with Satco lighting fixtures, it provides reliable and consistent performance. Its compact design allows easy integration into existing lighting systems. Durable construction makes it suitable for long-term outdoor use. The photocell is a practical solution for automated lighting control.