airport departure lounge, mexico city

I love the ceiling system of this airport departure lounge from Space International architects.  Not much technical info, but they say:

“This space consumes around 50% of the energy that other similar spaces commonly consume, by means of openings in the ceiling that let in natural light, the design maximizes the usage of daylight in the interiors, additionally generating extremely natural and pleasant sensations.”

And if you notice in the following picture, you can see how the change in daylight completely changes the appearance of the ceiling grid.  I’m curious to know if they have any electric lighting augmenting the ceiling apertures, or if just the floor + table lamps provide the lighting at night.

via Contemporist