I use DR Neons on my 5-string, and I don't really use it as my primary instrument anymore, but I did find i busted an inordinate amount of Bs and Es when I was, so form this I would surmise that DR's quality control, at least with these strings, isn't perfect and that the string's lack of lustre might be related to that.
I mean, I still use the strings, so I like them, but they're not perfect. Never really noticed about the glow, we don't play under blacklights. Although if we did I'd probably be more worried about the singer's pants
Also the white ones you've got there look really nice. I've only ever used green and orange, and have wondered about them. Might have to grab some.