What is the life shelf of the unopened Cyalume snaplight?

You all are going to think I'm making up stories, but I found a group of the Cyalume SnapLight sticks that was with some dry first aid materials that goes back to before Y2K. Perfect experiment, I thought. The green ones still glowed very brightly and although not bright were still visible 12 hours later. These things are really amazing.

Depends on your use... for brightness, without a doubt green. 2 reasons to get technical, first the chemical make up allows that color to glow brightest, and second is that the human eye sees this color better than any other light wavelength. If you're looking for "flares" though and need red, your best bet would be a strobe light. The red snap lights are good for low-light needs (hence using red lens flashlights in the military to read maps as the human eye doesn't pick this light up at low levels), but nowhere near what you would need for safety. Blues and whites are in the middle but don't nearly as long -better off with a LED flashlight. Go green...

Can they be stored in freezing temps in a car? Gets Brutal in NY in the winter

they can be stored in the car and they will not freeze

Will these give enough light to read if you need to find emergency phone numbers in phone book?

I was in a pitch black room door closed and no windows when I tried it out and I was able to find my locker and see the combination numbers on my lock. I thought it was pretty good. I'm sure you'd be able to see some emergency numbers in your phone book with this product. Hope this helped.

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Description

🔴 Light up your emergency kit — because safety never goes out of style!

VIVID RED GLOW - Command attention instantly with a bright red hue perfect for emergencies and signaling.
FLAMELESS SAFETY - Enjoy peace of mind with chemical light sticks that eliminate fire hazards in any environment.
ALL NIGHT ILLUMINATION - Stay prepared with a reliable 12-hour light source that outlasts the competition.
LIGHTWEIGHT PORTABLE - At just 230g per pack, these sticks are easy to carry and deploy anywhere, anytime.
DURABLE INDUSTRIAL GRADE - Crafted in the USA with lead-free materials, designed to perform under tough conditions.

Cyalume SnapLight Industrial Grade Chemical Light Sticks provide a flameless, vibrant red glow lasting up to 12 hours. Lightweight and durable, these lead-free sticks are perfect for emergency preparedness, outdoor use, and all-season visibility, making them an essential safety tool for professionals and adventurers alike.

Specifications

Brand	Cyalume
Colour	Red
Item Weight	0.23 Kilograms
Number of Items	10
Are Batteries Included	No
Indoor/Outdoor Usage	Outdoor
Specific Uses For Product	Emergency
Shape	Round
Container Material	Plastic
Occasion	general home decor
Seasons	All Season
Special Feature	Flameless
Style	Modern
Wick Quantity	1
Pattern	Solid
Material Type Free	Lead Free
Net Quantity	10.0 count
Number Theme	Number 6
Candle Type	Taper Candle
Country of Origin	USA
Model number	9-08002
Item Weight	230 g
Product Dimensions	2.54 x 2.54 x 15.24 cm; 230 g
Item model number	9-08002
Item Height	6 Inches
Item Width	1 Inches

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