Wolo (3900-A Lightning Bright Emergency Warning Strobe Light - 12-24 Volt, Fresnel Amber Lens Multi-voltage, 12-24 volt DC, single flash strobe light Produces a powerful 1.75 joules with 60-80 flashes per minute Has a replaceable Fresnel amber lens that is made to be water tight and to withstand all weather conditions The electronics are sealed in rock hard epoxy Designed to be compact in size for permanent surface mounting, all required hardware provided