GEAR AID Ni Glo 2” UV Rechargeable Glowing Keychain – Multi-Purpose Glow-in-the-Dark Accessory for Camping

Set these in the direct sunlight for an hour and they will glow all night. Perfect for tents, hammocks, backpacks, etc.Also, the glow part is a powder! If you needed to mcguyver a message with something sticky that would not be readily visible, this would allow that. Just break oben the bottom of the vial. Maybe dust some on the ground as a secret marker, endless possibilities!

This thing is bright and will last ten to twelve hours after a bright charge put on it

It’s great for putting on any gear or keys to locate items fast. I was a little confused I thought it was a two pack but it’s just a single.

These are really cool little tubes and are more durable than I expected. I have one on my motorcycle key, which inserts on top of the headlight assembly, so this little guy spends hours every day bouncing around in the wind and rebounding off the chrome, and hasn't even gotten it's first scratch. The included keychain is good quality, too.When in bright sun, like my bike key usually is, it will charge quickly and shine very brightly if taken into a dark space, but the brightness fades to a dull glow rather quickly. It also takes a bit to change using a bright flashlight, though a UV light does the job faster, but again, it fades to a dull glow within a half hour.Basically, if it's daytime and you drop your keys in the shade or into a dark place like a sewer grate, you'll probably find them very easily. If you lose them in the dark, it will could help you find them using a bright flashlight, but only if you sweep slowly enough to allow the material inside the vial to charge as the beam passes. Just don't expect it to still be glowing through the night, even if it was in direct sunlight all day long.It's much more cost effective than a tritium vial, but not quite as convenient. Then again, with these you don't need to worry about carrying a radioactive isotope in your pocket, either.The included photos are comparing this item to two other glow in the dark keychain I own. The Ni-Glo is clearly the brightest, by far. It also retains its luminesce much longer, but it's still only for an hour or two. The pics were all taken at the same time using different shutter settings because I couldn't decide which best illustrates the difference between the three. They had all just made the morning journey home from work in my pickup and had the same amount of light exposure.

It glows very well

I've uploaded pics of what this looks like after getting hit with 10,000 lumens (if you don't know much about light, 10,000 lumens is 5x - 10x brighter than an average fairly bright flashlight, or 2x - 5x brighter than car headlights on 'high') for a few seconds. I've put a competitor's (UVPaqlite) product alongside it for comparison. The UVPaqlites are bigger, which makes them a bit more visible: obviously when you're dealing with a very faint light source, a small one will be harder to see than a big one, but the big ones also might not fit on small zipper pulls and so on.As you can see, these are only ok, they last maybe 10 - 20 minutes at a decent brightness then get very faint. You could probably not use this to read after 10 - 20 minutes without recharging it. It would not make an effective nightlight after 10 - 20 minutes, either. I would not trust this to be visible for longer than 10 - 20 minutes on a dive, and while yes, you can recharge it, you might need to set a repeating alarm to remember to do so on dives.I don't really suggest buying these unless you're in a hurry, as you can make them on your own, very easily, and save a lot of money. Look for youtube videos about making reusable glow sticks and glow cubes using glow powder like this:https://www.amazon.com/gp/aw/d/B01M0RUBKV/ mixed with glycerin, resin or silicone caulk (Be aware that if you use a silicone caulk that cures with humidity, it can leak acids which are NOT safe for children, and may even cause bleeding if left pressed directly against skin for extended periods of time).If you're wealthy, or you really need something effective, buy newly manufactured green tritium vials instead. This has nothing on tritium.

Something fun and different. I bought these for my keys and gear when I'm off camping or at work. I like that they react well to sunlight and have a good glow through the night. They seem to be made of a good quality plastic. Small in size to not clutter or get in the way.

Waste - as said before - don't bother.