Survival School Lumica 6" Military Grade Safety Light Stick - RED x 10

Good size, easy to activate that lasts ages once activated and produces a good amount of light. I use these when scuba diving at night or in poor visibility so that I can see my buddy and they can see me without blinding each other by shining a torch. The carabiner style clip allows you to just clip it anywhere you want to. Good product at a good price.

They last really long and shine bright

Excellent - a couple of hours of bright light (sufficient to read in a tent) followed by almost 10 hours of diminishing light. Really good for marking locations on the hill at night or marking a path for an event. I even used one in last years 'halloween lantern' :-)

They seem to last a good 10 - 12 hrs ideal for up a mountain

I bought a heap of these for a night running event I organize. I tried this out in the house just to make sure the quality matches what I need. The product glowed for ages, certainly 10+ hours that I need. Each light stick comes individually wrapped with a clip to fasten to clothes etc. Good product.

Tested on my kayak, glows really well, I was visible to my buddies at 50m (probably further but we thought that was far enough) and the red is good to keep night vision. Left it attached to the kayak on the roof of the car on the 25 mile journey home to see if wind chill would affect the brightness - it seemed to maintain a good output throughout. Left it outside overnight and checked it after 10 hours and it was still giving off enough light to read a map. Overall excellent, certainly work as well as the ones I've used in the military. They're also small enough to fit in my PFD pocket without bending. I will certainly be buying some more of these.

Good for finding my tent in the pitch black

Haven't tried how they glow, got them as replacement for our emergency bag at work.