Convert that old battery eating lantern into a higher powered and longer lasting one.
What you will need:
An electric lantern (I used a 4xAA version)
LEDs (got mine from a light I purchased at Walmart)
Step 1: Crack It Open!
Not litterally, just remove the top and toss the bulb.
Step 2: Grab a Saw
Chop off some of the shaft (not necessary depending on your lantern).
Step 3: Attach the New Lights
I chose to go with Luxeon LEDs, but these are the real low wattage version. Not sure of the exact specs as I sniped it from something I bought from Walmart.
Anyways, check the polarity and soldier it to the wires that would have gone to the bulb. Then simply glue it to the base.
Step 4: Testing
Slap the lantern back together and test it. These LEDs were much brighter than the little 4v bulb and will outlast it in terms of life and power consumed.