I don't think this applies to those used in mountain climbing. You have to crack it in the center and they start to glow real bright for about 10 minutes. Bloody expensive temporary glow sticks though.
Glow sticks are different. You 'crack' them allowing the chemicals within to mix and react to produce light.
The OP was originally referring to glow-in-the-dark stickers which are the luminous paint catergory.
---------- Post added at 02:33 PM ---------- 6 hour anti-bump limit - Previous post was at 02:06 PM ----------
i always have a lighter in my pocket![]()
I used to leave a torch in my car too, nowadays no more. Just download a torch apps to my smartphone....
If you can afford it, a flashlight (even a cheaper one) is better than any handphone light app or lighter.
I went through all those options and still went back to flashlights.
Lighters are good for lighting fires but barely adequate as a dedicated light source and you cannot use them safely around engines or fuel lines if you needed to check under the hood in the dark. If you have a moderate to stiff wind blowing, good luck trying keep it from going out.
Handphones torch apps using the hp camera light is deceptively bright if you look directly at it, but the light it puts out has pitiful throw....which means it won't illuminate very far. It's adequate until you really need to see something further out. I had a power line short out on a street lamp pole a couple years ago leaving the whole street pitch dark. I can hear the electrical crackle and even see the hi-voltage arc discharge but what I could not see was whether any wires had came down. When reporting an electrical fault to TNB, they will ask you for a situation report and the pole number which is stenciled to the pole itself so they know where to send their teams. In a situation like that, there is no safe way to approach the scene (you cannot see your way around any hazards) unless you have a flashlight that can throw out a usable beam. My Samsung Galaxy S2 barely illuminated a 10 to 15 feet radius....certainly not enough to discern any details without approaching too close to potential danger.
A high quality branded LED flashlight doesn't have to be expensive. Companies like Fenix make compact but powerful AA flashlights which are also inexpensive, water-proofed and impact resistant.