It's $60 for 100 pack and I add them to my emergency kits for marking. To be honest I wish they were brighter but I'm comparing them to the blue LEDs I know. That's not an entirely correct comparison. For 60 cents these things are amazing. Look at the photo of its durability after 8 hours. It's in my bathroom with the door closed. It's still bright enough to draw attention and show location. I bought paracord to make swingers. They actually come with fine twine. They may be enough, but a 6 foot piece of paracord creates a fairly light disc when rotated overhead. I will be buying many more of these for my kits.
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