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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Cyalume Glow Sticks Military Grade Lightstick - Premium Green 6” SnapLight Emergency Chemical Light Stick with 12 Hour Duration , 10 Pack

Cyalume Glow Sticks Military Grade Lightstick - Premium Green 6” SnapLight Emergency Chemical Light Stick with 12 Hour Duration , 10 Pack

Product ID: 294443

💧Waterproof & safe underwater

🔋Military-grade high light output

🕒12-hour long-lasting glow

10.46 OMR

Duties & taxes included

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Description

💡 Light up your safety game with military-grade glow power!

BULK PACK FOR EVERY SCENARIO - 10-pack ensures you’re always prepared, whether for tactical missions, outdoor adventures, or emergency kits.
UNMATCHED 12 HOUR ILLUMINATION - Stay visible and safe through the longest emergencies with a full half-day of bright green light.
SAFER ALTERNATIVE TO ROAD FLARES - Non-toxic and durable, these glow sticks provide reliable signaling without the risks of traditional flares.
WATERPROOF NON FLAMMABLE SAFETY - Use confidently in any environment—even underwater or confined spaces—without fire hazards.
CERTIFIED MILITARY GRADE RELIABILITY - Trusted by US military personnel, these glow sticks meet rigorous DLA and NAMSA standards for elite performance.

The Cyalume Glow Sticks Military Grade 6” SnapLight pack offers 10 premium green chemical light sticks that deliver bright, 360-degree illumination for up to 12 hours. Waterproof, non-flammable, and meeting strict military specifications, these glow sticks are trusted by US armed forces and ideal for emergency, tactical, and outdoor use.

Specifications

ASIN	B004NBZLJ2
Best Sellers Rank	#18,690 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #9 in Emergency Glow Sticks
Date First Available	January 11, 2008
Is Discontinued By Manufacturer	No
Item Weight	8.1 ounces
Item model number	9-08076
Manufacturer	Cyalume Technologies, Inc.
Product Dimensions	9 x 6 x 1.2 inches

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