I need a cheap light setup (front and rear) for a 12 hour race I am riding in 3 weeks. I don't want to spend too much money or spend allot of time building my own since there aren't any trails in this area that I can legally ride at night so it will only be used for the race. Our team will probably be doing 1 hour shifts so I may need it for the most 2 hours of file on the batteries. Anyone have a suggestion for a cheap front and rear light (rear must be blinking red light) that will work ok?