I thought I got a dud, but after a long time under a powerful black light I did manage to get a faint glow out of my Swirl ESP Glo. Pretty lame to sell it as glow, but incredible feeling plastic with great colors.
The Glow label is a misnomer it's not meant to glo but it's the mix of plastic.
Glowfly is unbelievable but they are oop but they go all night I used to tuck it in my tent as a nightlight.