Do not let this little guy fool you.  Powered by a single AAA battery, it can put out 72 Lumens on high and 14 Lumens on low.

Light Output: 72 Lumens H / 14 Lumens L

Length: 3.8"

Light Source: LED

Run Time: 1h 45m H / 4h L

Battery : 1 AAA

Waterproof: IPX7