Walmart offers the Rayovac 6-volt Economy Floating Lantern for $3.97. Choose in-store pickup to avoid the $5.99 shipping fee. That’s the lowest price we could find by $7. It features a Krypton bulb with 75 lumens of output and a beam distance up to 741 feet. It includes a 6-volt Rayovac battery, and the color is chosen randomly (among red, blue, and yellow).