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

Is the shape like an octagon to avoid rolling on a flat surface?

Seems to not roll due to flat sealed end not to say it would not roll on a steep incline hope this helps

Are these Coast Guard approved instead of light them up flares?

I can't give you any kind of legal advice ("...approved by Coast Guard..."), but I'd suggest to you that the soft and gentle glow of a Cyalume Stick would be quite close to useless if you were stranded out on the water and were waiting for the Coast Guard - anyone - to find you.

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Cyalume 9-00721 Snap Light Stick, 6", Red (Pack of 20)

Product ID: 24199967

Details

Are Batteries Included
No
Brand
Cyalume
Color
Red
Indoor/Outdoor Usage
Outdoor
Item Weight
1.01 Pounds
Number of Items
20

🔴12-hour bright red glow

🪝360° illumination with hook & hole

🛡️5-year shelf life, non-toxic & safe

AR$106049

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Description

🔦 Light up your safety game—because being prepared never goes out of style!

ALL NIGHT VISIBILITY - Stay seen with a powerful 12-hour red glow that commands attention in any emergency or outdoor setting.
LONG TERM RELIABILITY - Stock up confidently with a 5-year shelf life, ensuring your emergency kit is always ready when you need it most.
TRUSTED BY PROFESSIONALS - Military-grade quality trusted by U.S. Government and NATO—because your safety deserves the best.
360 READY TO USE DESIGN - Instantly activate and hang or attach your light with the built-in hook and hole for versatile, hands-free illumination.
SAFETY FIRST CONSTRUCTION - Non-toxic, phthalate-free chemiluminescent formula inside a durable, waterproof plastic body—safe for you and the environment.

The Cyalume 9-00721 Snap Light Stick is a 6-inch industrial-grade red chemiluminescent light providing 12 hours of 360-degree illumination. Waterproof, non-toxic, and phthalate-free, it features a hook and hole for easy hanging or attachment. With a 5-year shelf life and trusted by military and emergency professionals, this pack of 20 ensures dependable, maintenance-free lighting for emergencies, outdoor adventures, and industrial use.

Specifications

ASIN	B010S58BNY
Additional Features	Non Toxic
Batteries are Included	No
Best Sellers Rank	#87,637 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #34 in Emergency Glow Sticks
Brand Name	Cyalume
Candle Type	Taper Candle
Color	Red
Container Material	Plastic
Container Type	Can
Customer Reviews	4.7 4.7 out of 5 stars (1,053)
Indoor Outdoor Usage	Outdoor
Item Dimensions W x H	0.2"W x 6"H
Item Type Name	Light Stick
Item Weight	1.01 Pounds
Manufacturer	Cyalume Technologies
Manufacturer Part Number	9-00721
Manufacturer Warranty Description	Limited warranty.
Material Features	low density, phthalate free
Material Type	Plastic
Material Type Free	Phthalate
Model Name	9-00721
Model Number	9-00721
Number of Items	20
Occasion	Emergency
Packaging Type	Individually Wrapped
Pattern	Solid
Product Style	Industrial
Scent Name	Unscented
Seasons	All Season
Shape	Round
Size	20 Pack
Specific Uses For Product	Emergency
Target Audience	Emergency responders, campers, and outdoor enthusiasts
Theme	Emergency Preparedness
Unit Count	20.0 Count
Wick Quantity	1

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AR$106049

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Argentina.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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