Hello Rob,
I'm afraid my French/German doesn't run to "white light bulbs"!!!
As it happens, I'm French-Canadian, so I can help you out

A light bulb is an "ampoule" (pronounce "am-pool") and the white light that mimics natural light is called "blanc doux" (or "soft white", if you will, and is pronounced "blan doo").
At least, it is called soft white in Quebec, it might have a different name in Europe.
The advice Gail gave you about staging is exactly what I would have done. You could also try to play with shadows, if possible, or light a candle in the room. It all depends on what you are trying to achieve exactly.
A last thing you could do is to look at some real estate advertizements, or hotel room pictures (those are found on almost every hotel web site). View those pictures for inspiration.