Funny they tested sunlight through glass, not direct sun.

Glass removes most UV and a lot of the useful spectrum.

Yet it still outperformed artificial lighting.

Even the DILUTED version of sunlight is better than the LEDs in your house

A filtered, watered down version of the sun still beats the ENGINEERED lighting we built to replace it.

Take away UV.
Strip parts of the infrared.
Flatten the spectrum through a pane of glass.

And it still works better.

We spent decades designing LEDs, tuning color temperature, optimizing LUX.

And a weakened version of the sun still beats it.

Maybe the problem isn’t the engineering.

Maybe the sun already figured this out.