Buoy Replacement Light Engine – Solar Self-Illuminating Buoy Spare Keep your Aquamentor Solar Self-Illuminating Buoys operating at peak performance with a genuine replacement light engine. The light engine is the core illumination and solar charging module of the 20" solar buoy system — when the engine reaches end of life, this replacement restores full nighttime illuminating capability without replacing the entire buoy body. A significantly more cost-effective approach for marina operators and facilities running multiple buoys. Direct Replacement, No Wiring Required Designed as a drop-in replacement for the Aquamentor 20" Solar Self-Illuminating Buoy. Sealed waterproof housing. Solar panels charge during daylight; automatic dusk activation. Compatible with all 6 color variants of the Aquamentor 20" buoy. Specifications Compatible with: Aquamentor Solar Powered Self-Illuminating Buoy, 20" Type: Replacement light engine (solar + illumination module) Environment: Freshwater and saltwater Activation: Automatic at dusk For the complete buoy, see the Aquamentor Solar Powered Self-Illuminating Buoy collection. Contact Aquamentor for bulk replacement engine pricing for marinas and facilities.