We usually went with what we had. I do remember there was one (either green or red) that didn't show up well or at all on NVG's. There are IR chem sticks that show great on NVG's but are invisible to the naked eye. Cannot see needing those in the civilian world though. Wouldn't even know where to get them.

I also like keeping one or two of the ultra bright 5 min. sticks handy. Usually when I would set an LZ, I would use one of those into the wind. Don't use them near NVG's though.