This is a 120V led pool light bulb, not available for 12V systems! Medium base (E26/E27), unscrew the old lamp to replace the LED pool bulb, easy to use. Works with most Pentair and Hayward fixtures. Pool lights offer a variety of lighting options, red, green, purple can be mixed and matched to your favorite color combinations. Pool lights offer a variety of modes to make your pool colorful at night. The LED pool light is upgraded with more led beads and more even distribution to provide high intensity lighting. It can evenly illuminate a 40,000-gallon pool, equivalent to a 300-400W pool bulb, and save up to 80% on electricity costs. The new antenna design strengthens the remote control signal reception. The pool led light uses upgraded high-brightness LEDs to provide super bright lighting. Using upgraded driver, aluminum fins on the back to optimize heat dissipation, effectively avoid overheating, scientific and reasonable design to extend the service life of the bulb.