Hehe just another note. I think the Singapore version is infused with squid's gene if I'm not mistaken to cause the glow.

BTW cardinal tetra is afraid of light. So keep them in a dark/dim area. That's why it has the glow. Very nice species of schooling fish. Extremely hard to breed only few successes recorded lately. Never bred before in captivity. So previously all the fishes were actually imported from South America.