This view is taken from my desk in my former office. Can you spot the switches in this picture? If you can see, the left switch is for air-cond and the right switch is for lamp.

Why on earth these switches' location matter? Well, because I am a designer and I used to have this office as my workstation. It's kinda troublesome for me to switch on/off these switches every morning and evening. Not very practical for a lazy person like me :p

Lesson learned?
Well, designer don't simply design, there's reason behind every design we do. Some because of cost-saving, some because of project specification/requirement; above all, practicality. I guess I love my job designing so much :) :)