DokLites serve the conventional purposes of piling cap, whether it be to guard against birds or rain. They also use Mil-Spec micro-processor circuitry to create a comfortable, ambient light on your dock. Each has a UV and impact resistant housing. DokLites, and the LEDS within them, will last and be protected for years. To help your DokLite® last longer, we suggest using our DokShine Plastic Polish! OurDokShine Plastic Polish will help protect your DokLite® for many years.