Hi Kate,
For goodness sake if you're out in your PJ's again in the street, come in woman, you'll be giving the Forum a bad name. I know what you are doing, you are sitting in the car with the mood lighting on saving electricity in the house!!
What are you doing in the dark, putting Megs Tyre Gel on the tyres?
Andrew was right about the Driving Lights, as a general rule I tend to leave my lights on automatic that way you don't forget that you haven't got your lights one which some people as Andrew said they forget. They see the dashboard clocks lit up and forget there's no lights on behind.
I think these auto lights are really good on the Peugeot, I have them on my TT and they are little faster at going off when they've come on, if that makes sense. The Audi's lights are quick to come when you go in a tunnel, but take ages to go off when you get out the other side. Whereas the Peugeot's come on instantly and instantly go off when you get back into daylight.
You won't be using any additional fuel the alternator and battery can cope with the additional load.
Sounds like you are enjoying the car with your daughter good for you they are a great car for families.