... powder (is called glow powder, luminous pigment, luminescent pigment, glow in the dark pigment, night light pigment, night glow pigment, etc. also. ) were known as the ... shoelace / strings, photoluminescent glass, photoluminescent cup chap, photoluminescent mosaic, photoluminescent stone / pebble, photoluminescent football, photoluminescent garden light, photoluminescent arts & crafts, etc ...