I noticed when driving with my lights on ( because I have to since I work nights so it's always dark to and from work ) that my mpg is pretty bad. My girl friend always drives when there is light out in her prius so she seems to get about 2 mpg better then me all the time. Is there any way of improving this? I have a III so no LED lights. That would of came in handy for me. Anyone know of light bulbs that use less electric but still bright as the OEM?