I am not sure I would low-pressure sodium in doors but non-white lighting is interesting. I replaced my porch lights with yellow LED "bug lite"'s and they are so much nicer for outdoor lighting than the blinding white porch lights they replaced.
I'd like to do something similar inside too. I sometimes work nights and keep odd hours and my GF gets mad at me because I leave lights on at 3 AM. I'd like to install some warmer lighting for after hours so it doesn't look like daylight in my home 24x7. Maybe some of the new color changing LED's will do the trick?

Where is the toilet? This is going to disturb me for quite some time.

The kitchen looks big to me. I would opt for more living space and less kitchen space... after all doesn't Paris have some good restaurants? Oh, and a toilet would be good.

I've seen several limited space designs for apartments. Mostly impressive.
If a civilization wishes to raise all its population up to first world living standards, and cater for the 100+ billion people that this planet can truly sustain, then we need to get used to intelligent accommodation layouts.
Agree with Diachi about changing the choice of light. There are some innovative LED and luminescent material technologies around the corner that can create efficient and stunning results while removing the need for a dedicated outlet. ie - the sodium lamp side of the wall can better accommodate the missing toilet if the wall would iridescently glow :)

Very nice!
Just pray that they don't fall off the sleeping shelf down onto the living room/bathroom floor.
A dab of tub and tile caulk would clean up some of the cracks to make it perfect.
Does one study in the kitchen?
I still love it.
Bill

The toilet is a mystery. Closet space (or lack of) is also a question. Overall the look is great but as a practical living space, this is in question.

No crapper, no closets and, Oh, don't wack your head on the corner of the stairstep above the sink. No thanks, not for me.

One slip as you're going downstairs and you could take out every one of those neon tubes.

The architectural equivalent of foot binding (http://en.wikipedia.org/wiki/Foot_binding). Just goes to show you that a certain class of people can be taught to desire ANYTHING.

I've seen Paris apartments with the toilet in a separate room across a hallway from the apartment space. Updating buildings that were made before indoor plumbing can produce some unusual layouts.
Doesn't sound like fun on a winter morning.