Holder for lifebuoy light

SOLAS approved traditional bulb type lifebuoy light that meets all YA regulations. Operates via a mercury switch and is very economically priced. Must be stored upside down - light activates automatically when facing UP in the water. Includes dual O ring lens seals and requires 4 x D cell alkaline batteries (not included) to operate the light. Use ONLY Alkaline batteries Duracell or Energiser type. Do NOT use standard type D cell batteries. Fully approved for use on commercial vessels or pleasure craft. Shows a continuous bright white light when fl oating upright in the water.