Large1.Luminous Sand: Under normal light it shows original color. After being irradiated by usual light or black light, the sand has luminous color even when lights are off. Without light absorption, it doesn’t have luminous effect.
2.Spectrum Sand: Under normal light it shows original color. It only shows color when irradiated by black lights. With normal light or no black light, there is no color effect but its original color.
3.Color -Changing Sand: Under normal light it shows original color. Under continuous black light irradiation, it shows colors and has luminous effect when black light is off.
PS
1.All sands show their original color, which is white, under normal light.
2.Luminous lasting time: Under water it lasts about 10~30minutes and then slowly fades away. Under usually decoration, it lasts about 3 hours and slowly fades away.
3.Black light (BLB tube).
Star sandy