I don't know how it compares with the professional stuff that Herman30 mentions, but I've found that even not-so-great GITD stuff works pretty well.
Judging from the photo it is as good as the one I bought. I bought from a hardware store webshop. One could choose varietys based on how long you want it to glow, was from a few hours to 30 hours. The longer glow time the more expensive. I took the 7 hour glow time. Enough to get through the night.
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