Not sure if the bulb is LED or a filament, but the fan is spinning.
Nice job, for a quick-and-dirty build. Of course you’d probably lose it out in any real wind, but it does OK on the wall of a guy’s balcony. I had to laugh when he just set it down without bolting it down!
I’m guessing the upwind blades are inside the wall, while the downwind blades are more exposed. There’s a name for that architecture - trying to remember what it’s called doesn’t even need curved blades.
OK I just looked it up in that booklet from the '70’s that has every known type of wind turbine.
They just have it labeled “plates” and “shield”. The upwind-traveling blades (plates) are shielded from the wind. Actually, this is the very oldest design from 3000 years ago, where they used square sails, turning like a revolving door, with the upwind half blocked by a stone wall. Peak Fred Flintstone.