The stuff that I use is really bright, to me at least, and it comes as a powder as well. Really cheap too. I get it at midwest. It comes by the five pound container. The item number is HANP1000.
That lightwithoutpower site looks like they have some really good products. While I like the han-see glow pig, it only comes in the standard green. And I don't know if it would work well with discharge.
JmanRT, your printing is really good btw.