Everyone can improve the environment, starting at home:
And don't forget to equip yourself for night-time outings!
Everyone will have noticed that many businesses have their signs lit up all night long.
What's the point? To let people know they exist!
The intention is understandable, but... let's face it: at 2 a.m., people passing by rarely think "Hey, why don't I go to *machin* tomorrow and buy something", do they? Have you ever? How many times?
Probably not many, so the next time you visit your beloved shop, ask him if his sign is lit at night, and why?
With all the arguments presented here, you've got everything you need to explain to him that this isn't a good idea.