<p>Chinese consider both sunlight and moonlght are absolutely good things, lights expels devil for sure. Darkness is for eveil. This is same as western culture. </p>
<p>Sunlight kills germs. </p>
<p>The favor of lights in my opinion also means favor for warmth, I would not consider bed room above kitchen is a bed thing, beside there are many remedy for the warmth from kithen below, like a fan on the window, open the door to let air flow, thanks to bkshops's previous posts about how to ventilate the house.</p>
<p>Western faced room are very hot in the evening of the summer, but it is a feng shui defect. </p>
<p>I have a retire aged coworker, the AC in office is too cold for him, he put a heater at his feet in his cubicle all the time. In my opinion, aged people need more warmth than young people, they might like the room facing west. </p>