i don't think they are dyed, theres no way you could get that line through dying. The do look like nicer glowlights, they aren't glowlights though. They look a bit like rainbow tetras, but they arn't.
never seen them before. any change of getting a vid up?
actually i'm gonna back track and go with Glow Lights after watching that vid link. Although when i had some glowlights, they didn't 'glow' as much as them.