Specification Brand : Moderock BulletPoint1 : High-temperature resistant borosilicate glass housing, size: 0.2‘ diameter × 3.9’ length, 5 mm diameter × 100 mm length. BulletPoint2 : Continuously emits light for 20 years without the use of any power. BulletPoint3 : Gas undergoes pure beta decay and low energy beta rays excite the phosphorescent material on the inner wall to emit light. BulletPoint4 : This special gas is a weak light source that can only be seen glowing in the dark and does not require any external energy source. BulletPoint5 : The half-life of this particular gas is 12.3 years, i.e. in 12.3 years the luminosity will be half of what it is now, and in 24.6 years it will be a quarter of what it is now. BulletPoint6 : The decay product of this particular gas is helium-3, and even if it stops glowing after a few decades, it's still full of the rare helium-3! BulletPoint7 : Ideal for collecting, displaying, teaching, gifts CustomerPackageType : Standard Packaging IncludedComponents : Luminous Stick ItemName : Self-Luminous Rare Earth Luminous Stick, Sustainable for 20 Years Lamp Fluorescent Rods, for Collection Display Teaching Gift ItemPackageDimensions_Height : 5.5 inches ItemPackageDimensions_Length : 7.8 inches ItemPackageDimensions_Width : 4.3 inches ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-gas-cylinders Manufacturer : Moderock Ltd. ModelNumber : C545 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : CQ02 ProductDescription : Luminescence principle: The inner wall of a borosilicate glass tube is coated with a fluorescent-containing paint, filled with a trace amount of gas and sealed. The gas will release a small amount of electron flow uniformly, which will excite the light material on the wall of the tube and make it emit light. ProductSiteLaunchDate : 2025-03-06T08:28:44.168Z SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 50 UnspscCode : 41120000