I’m not entirely sure where they got that $79 reference price from 
Maybe 79 Pesos
Just realized this sort of light would be great for dog walks on dark winter evenings. I bet I can do better than $10 each, though.
Found a couple “better” deals with the same picture in the Amazon…
A dollar cheaper for the “punlim” version - PUNLIM 2-Pack Rechargeable LED Headlamp Flashlight, 230 Lighting, 800 Lumen, 3 Modes, Built-in Batteries, Waterproof Headlamp Flashlight, Suitable for Camping, Running, Hiking https://a.co/d/ew7d1Zy
Or you can get the “hopedone” 4 pack for $34.69 after $4 coupon - Hopedone Rechargeable Headlamp,4 Packs 230°Wide-Angle 1000 Lumens Headlamp Flashlight with Red Taillight 3 Light Modes Lightweight LED Head Lamp Adjustable Waterproof Head Light for Running Cycling https://a.co/d/8vG2hWj
Those are especially good deals for folks with 2 or more heads.(“Hey Zaphod, check out this deal!”)
I’m gonna use these when I’m looking inside my Paris Hilton minifridge
Actually good to keep one charged. I read a review on another headlamp, in situation were battery drain would be a disaster, wear the spare around your neck to use when #1 battery dies. Great idea!
Wouldn’t it depend on the size of the dog?
Great point. One more thing I’ve got to keep charged that i don’t need.
These are super lightweight and an adjustable comfortable fit. Nice bright light. I’m happy with this purchase!