LED models usually have more long-lasting life spans than halogen models.
Underwater boat lights will typically have a lifespan of about 50,000 hours.
Tip: LED underwater lamp life span is roughly half as long as halogen lamps due to the heat produced by the LEDs causing them to burn out more quickly. Halogens also emit UV radiation that causes plastic housings and lens covers on underwater boat lamps to degrade over time which can shorten their lifespan even further.