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 SnapLight Yellow Glow Sticks – 6 Inch Industrial Grade, Ultra Bright Light Sticks with 12 Hour Duration (Pack of 10)

Cyalume SnapLight Yellow Glow Sticks – 6 Inch Industrial Grade, Ultra Bright Light Sticks with 12 Hour Duration (Pack of 10)

Product ID: 143684263

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⏳12-hour ultra-long glow

💧waterproof & safe

💪industrial-grade durability

Description

⚡ Light up your world—anywhere, anytime, no excuses.

SAFE VERSATILE USE - Waterproof, non-toxic, and non-flammable for peace of mind in any environment.
TRUSTED BY PROFESSIONALS - Crafted in the USA and relied on by military and safety experts for over 40 years.
RUGGED INDUSTRIAL STRENGTH - Built tough to withstand harsh conditions—because your safety deserves no compromises.
UNMATCHED 12 HOUR ILLUMINATION - Stay brilliantly lit through every emergency or adventure without a flicker.
INSTANT ACTIVATION ZERO HASSLE - Just bend, snap, and shake to flood your space with bright, 360° light—no batteries needed.

The Cyalume SnapLight Yellow Glow Sticks deliver industrial-grade, ultra-bright 360° illumination for up to 12 hours. Waterproof, non-toxic, and non-flammable, these 6-inch sticks activate instantly without batteries, making them essential for emergency preparedness, tactical use, and outdoor adventures. Trusted by military and safety professionals, each pack of 10 is individually sealed for a 5-year shelf life and engineered in the USA to the highest quality standards.

Specifications

Manufacturer	Cyalume Technologies, Inc.
Part number	9-08004
Item Weight	230 g
Product Dimensions	23.6 x 10.59 x 4.39 cm; 230 g
Item model number	9-08004
Size	10 Pack
Colour	Yellow
Style	Industrial
Shape	Duration: 12 Hour
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No

Reviews

J**N

Best glow sticks

Great glow sticks, they are super bright and last for 12hrs plus

26.06.2025

A**R

Snaplight

Lasted longer than I expected.

24.12.2024

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