Car Battery

I would like to know that at night time, does turning the lights off during a red light for example, does it have any benefit for the car battery? would it make its life more, i mean does it make any difference? also, lets say i have to wait 5 mins at the red light. would i save fuel by shutting the car off and then restarting it? or would restarting it after only 5 mins consume more fuel. also restarting again and again would wear down the battery etc etc. so is it better to keep it on for that 5 mins at the red light? thanks for your answers.

Shutting it off and restarting it that often would certainly put some wear on the starter motor. and not it wouldnt affect the life of your battery, because it is your alternator or generator that are making the electricity at that point. plus, shutting the car down would consume more fuel. when the car restarted it would begin in "rich" mode until a certain time elapsed, thus fuel fouling the spark plugs and using more fuel. hope that helps.