The Original Krill Lamp lasts over 120 Hours on a set of 2 AA batteries (not included), with an overall rated life of +2000 hours. It is water proof up to 150 feet, and weighs only 3oz with batteries (about 3 chemical light sticks). The Krill Lamp is extremely durable, able to survive drops of 50 ft onto concrete slabs.
I understand the brightness on this is about the same as a 12 hour Cyaclume chemical
light after it has been on for about an hour. Given that a $1 battery can run a Photon
green/turquoise for 200 hours, the Photon may be a better alternative given its tiny size.
The Photon is not waterproof though it is about the size of a quarter in diameter, and 3
quarters thick. I don't think it to be the most efficient way to produce light. LED's are
more practical. One can take a 22 ohm ristor 2 D alkaline cells and one super bright
LED from radio shack and keep it going for over 1.5-2 months at 24 hrs/day 7
days/week. The light is concentrated in a small useful angle, much more efficient over
Offered by Mike.