The products will not shine in the dark environment.There will be rection only under certain . These luminous party supplies look bright in the sun, but they will glow in the , and glow in the light, creating a beautiful fluorescent effect for your party; They are suitable for most occasions, such as party, theme party, birthday, wedding, growth party, stage decoration, carnival, dance party or any other that need bright . Go DIY you party from these products. Glow Party Supplies: Perfect for making a homemade Twister game and party dance floor decorations. Bright Color: Our dance floor props accessories are avaliable in 5 different colors, such as purple, yellow, orange, green and red. size: 20cm Material: paper colour: Multicolor Package Contents: 100 x luminous Paper(5 color, 20 sheets for each color) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.