Our KE-501 CB with a 2-bolt hole mount (clear lens/blue LED) offers a unique overhead view with 4 LEDs and a 360° dome lens to provide optimal illumination. It is completely weatherproof, vibration resistant and has an expected battery life of 5 years. The 501 is lightweight in design and is ideal for flags on top of locomotives. It is our only solar light that can charge from its unique internal solar panel design. This light includes a photocell but can be manually turned on/off with push-button.