a flexible liquid tight marker light that comprises a light source encapsulated by injection molding a light transmitting elastomeric polymer to form a protective casing which further includes an imbedded wiring harness electrically connected to said light source and imbedded structural members that protect the light source from excessive flexing and impacts . the wiring harness and structural members provide heat sink means for the light source . the casing is comprised of variable durometer tinted polyurethane elastomers with light diffusing pigments added . diverging optics are molded into the casing outer surface .