These are fun comforters for your space-loving child. They glow in the dark brilliantly. Other reviewers who had problems with them not glowing much probably did not have full room lighting before shutting off the lights. A small table lamp will not do the trick. In order for these to fluoresce the best you need to turn the ceiling/ full room lights on for at least a few seconds immediately before switching off the lights completely. (If I have been reading to them by their small rocket ship lamp I say "Close your eyes boys" and they shut them while I switch on the brighter ceiling lights for a few seconds before turning their lights off for the night.) Any way, that's how all the glow stuff works. My boys (5 and 8) really enjoy these comforter sets. Nice job again, Overstock!