A small light that marks a location can be useful even when it won't illuminate the route to that location. The 25 Ultra Bright Green Glow Sticks - Individual Packed With Lanyard - For Camping, Emergency Survival - Glow Lights for Blackouts, Hurricane and Storms- 6 Inch Chem Light Sticks with 12 Hour Duration is a set of six-inch chemical sticks, not a substitute for a working flashlight.

Twenty-Five Single-Use Lights

The quantity makes this more relevant to distributing supplies than buying one everyday light. Individually wrapped sticks could be divided between kits while unopened. Lanyards provide a carrying or attachment option, though I'd keep anything worn clear of places where it could snag.

Quantity: Twenty-five green sticks.
Size: Six inches.
Package features: Individual wrapping and lanyards.
Advertised duration: Twelve hours.

Duration Doesn't Mean Constant Brightness

Chemical lights produce light through a reaction after activation. They aren't rechargeable, and switching one off to save the remaining use isn't part of this format. The listed duration should not be read as twelve hours of unchanged output.

I'd use a stick for identifying an item or helping someone find a nearby location, then use a headlamp for seeing what I'm doing. Temperature and product condition can affect chemical-light performance, so the package directions and expiration information deserve attention.

Buying in Bulk Has a Storage Tradeoff

Twenty-five sticks are only economical if the quantity fits your plans before the supplies age out. Store them as directed and protect the sealed packets. A damaged wrapper or an accidentally activated stick reduces the benefit of having spares.

I haven't measured these sticks. I'd compare the pack for low-maintenance supplemental marking, especially when supplying several kits. For repeated household lighting, a reusable LED light would be the more practical first purchase.