Artificial Luminous Lamp (Without Tritium Gas)Glass Tube Luminous Emergency Lights Glow In The Dark (Replace Tritium Gas Lamp) (Need To Absorb Light Before Use)Features: Glass Tube, Luminous, Bright And Visible In The Dark. Long service life, it needs to be filled with light to emit light, and ultraviolet radiation is usedIdeal for decoration, jewelry, glasses, clock, etc. Suitable for indoor and outdoor use. Maintenance-free: easy to install, no maintenance required. Note: If you need to absorb the light before use, it will light up immediately. If you need it to shine for a long time, you need to put it under the light for an hour. Specification: Size: 1.5*6mmScope of application: Glass tube can be directly used in aerospace, instrumentation, subway, tunnel, fire, etc., and civil industry, such as jewelry, watches, fishing equipment, luxury goods, glasses, gifts and other industries. Packing: 1x Piece of Glass Tube