Light game tools, 3-piece set When using the UV light, please remove the insulation seal. For Ajing, Mebaring, etc. Please refrain from purchasing if you are concerned about long-term storage. Effective for phosphorescence of mebaru worms. Snap design allows for easy attachment and detachment to D-rings, zippers, etc. Product Details UV Light Weight: 12g Batteries used: 1.5V lithium battery x 3 Continuous lighting: Approximately 7 hours *This product is no longer available from the manufacturer, so we cannot accept inquiries or provide after-sales support. We apologize for any inconvenience. Buyer's Recommended Comments 【Excellent usability!】 This bright light is only 35mm in size. Very lightweight and compact. It utilizes UV (ultraviolet) light to provide excellent phosphorescence for night-glow materials. Mebaru worms, etc., will glow brightly in an instant. It is very lightweight and small, so it can be used on zippers of bags and clothing. If you attach it to a key ring with the included carabiner, it is also ideal for keyholes of doors at night and for work inside a car. You can also use it for UV-curing sealants, and it hardens instantly when irradiated with this light, which is more convenient than sun drying, which takes time, and is very convenient at the fishing spot. Ideal for replacing hooks on small plugs and spoons Recommended ring size #0 to #3