Blade Colors:yellow-green, invisible turquoise, invisible orange, invisible purple, light-blue, fire-red, orange, orange-red, light-green, light-yellow, light-blue, bright greenThe glow in the dark lightsaber blades are made using a new type of long after-glow photoluminescent material. Free from any radioactive substance, it can glow in the dark automatically after absorbing varieties of visable lights. The process of absorbing and emitting light can be repeated forever. The blades are manufactured in 12 colors and made to fit stock  LEGO lighsaber hilts. The point has been rounded to make it look more realistic.Glow time of these custom blades will varyLEGO is a trademark of the LEGO Group of Companies which does not sponsor, authorize or endorse this productSTAR WARS is a trademark by Lucasfilm Ltd. which does not sponsor, authorize or endorse this product