Ann,
Can't remember if I emailed you before about your car, but in Germany or the UK whenever work is done on a car, you always - SHOULD always - be given the option of the old parts back. If they've taken off old lights and put in new ones, you still own the old ones. You should take them, otherwise someone else will make a good few hundred dollars by selling them. Clearly you don't want old belts and filters back, but key parts are yours and you'd be mad not to take them. If they haven't given them to you, I would deduct the cost of new lights from the final bill. Otherwise you're been seen off.
JH