Today I bought a 10 LED Rayovac EFL6V10LED-B, floating lantern. 85 lumens with 45 hour battery life. Comes with a 6 volt battery, $5.88. What a deal. Edit -- 2-9-2013, Today i noticed my Walmart has lowered the price to $5.48.
The "old" version of this lantern with a krypton bulb is rated 75 lumens and 4.5 hours run time. The NEW 10 LED version is 85 lumens and 45 hours run time with a general purpose non alkaline battery. 10x longer run time with 10 more lumens, can you believe this?