Fluorodiving Fluorescent Dives Lamp Bio-luminescence Enhancing Lights Flourescence Night Diving Video Torch with 1500lumens 3pcs Cree 45nm Blue Led Ultra Violet Lights (Torch+lanyard+ box) Explore the underwater world at night in a completely different way with our specially designed bio-florescence enhancing lights. Flourescence night diving which is also commonly referred to as fluo diving or glow diving is quickly gaining popularity by the new and exctting visual experlence it offers for divers. Our lights can paired with a yellow viewing filter will allow you to see flourescent corals, fishes and other marine life in a unique and magical way. Magnetic Ring Switch on Head 3pcs Cree XLamp XT-E Royal Blue,1000-1500Lumens L: 205mm D: 63mm (head) Inside the dead have sapce to include Additional Dichroic Filter,the size is Diameter 48mm * Thickness 2mm (we not provide this filter current)