at a bluegrass fest last weekend the most interesting lighting i saw
was what seemed to be a bulb suspended in a bucket. This was in a
place where there wqaws electricity and the bulb was probably at least 100 watts. the white bucket (5 gallon food-type one) glowed with an
even white light that lit up an area about 15 feet by 15 feet. it was
hung about 8-10 feet above the ground.

there also is a small propane lamp called the mighty light
which uses a small propane cannister.
http://www.rei.com/product/47670651.htm