Would I be able to go free diving with this in a state park spring?

Great day Zachary, Great question,Yes you can, Factory short description;Cyalume's industrial grade 6 in. SnapLights provide 360 of illumination. They are foil wrapped for light/moisture protection, maintenance free, non-toxic, non-flammable, and waterproof.A customer in San Diego, CA stated; A must have to keep around for emergencies, also good for the kids at parties, in campers, on boats,etc.We zip tie them to our scuba dive gear when we do night dives a great safety light!Thanks for asking, RiccaPlanet

I saw a military grade version that only last for 30min. How come these lasts for hours?

There are different grades of light sticks for different uses. The 30 min you saw where rated as High Intensity, those last for approximately 30-45 minutes at the maximum output. There is also an Ultra-High Intensity version which lasts for only a few minutes. Those are rated for 5 minutes of maximum output. They either put in a catalyst to speed up the reaction in the high intensity sticks or an inhibitor in the longer time sticks. The longer the time on the stick, the less light output. I hope that helps.

I understand the use for all the colors but blue. What are these for?

Blood shows up under blue light better.

Do these have an expiration date? I'm thinking of putting them in my disaster kit.

Yes they do. The packs I bought early 2015 have the expiration date of 11/19 so they last over four years at least. They work great. Hope this helps.

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SnapLight Blue Glow Sticks - 6 Inch Industrial Grade, Ultra Bright Light Sticks with 8 Hour Duration (Pack of 10)

Product ID: 257166043

Details

Brand
Cyalume
Item dimensions L x W x H
22.2 x 8.3 x
Item weight
0.22 Kilograms
Number of pieces
10

⏳8-hour long-lasting light

💧Waterproof & non-flammable

🔵Ultra bright blue glow

¥8677

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Description

🔵 Light up your night with military-grade confidence!

SAFE VERSATILE - Non-toxic, waterproof, and safer than traditional flares
INSTANT ACTIVATION - Just bend, snap, and shake for immediate bright blue light
BULK PACK ADVANTAGE - 10-pack ensures you’re always prepared for any emergency or adventure
ALL NIGHT VISIBILITY - Keeps you lit for a full 8 hours without fail
MILITARY GRADE RELIABILITY - Trusted by US military for 360° tactical illumination

Cyalume SnapLight Blue Glow Sticks are industrial-grade, ultra-bright 6-inch chem lights designed to provide reliable 8-hour illumination. Waterproof, non-flammable, and trusted by the US military, this 10-pack bulk set offers safe, instant activation for emergency, tactical, or outdoor use.

Specifications

ASIN	B004NBZLJC
Best Sellers Rank	#32,800 in Sporting Goods ( See Top 100 in Sporting Goods ) #13 in Emergency Glow Sticks
Brand Name	Cyalume
Customer Reviews	4.7 4.7 out of 5 stars (866)
Included Components	Glow Sticks, Emergency Light Sources, Tactical Glow Sticks, Chem Light Military Grade, Blue Chem Light Bulk Set
Item Dimensions	22.2 x 8.3 x 7.6 centimeters
Item Weight	0.22 Kilograms
Manufacturer	Cyalume
Manufacturer Part Number	9-08003
Model Number	9-08003
Number of Items	10
Number of Packs	1
Number of Pieces	10
Set Name	SnapLight Blue Glow Sticks
UPC	852845001113
Unit Count	10 Count

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¥8677

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In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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