One of the funniest parties I ever went to was an Old Lady Party. We all shopped our local Salvation Army for vintage hats and orthopedic shoes and what a fun mix of outfits we created! Then we went out later and got asked to dance a lot!
A 20-watt CFL floodlight is as bright as a 100-watt incandescent, but uses one-fifth the energy. They come in many colors; a weatherproof, 20-watt CFL floodlight is about $10 and will last 8,000 hours, or more than 30 Halloweens.