Maybe in California you don't need this, but in the northern half of Europe (i.e. Germany and above) the weather this time of year is pretty abysmal. My office has floor to ceiling glass on three sides, but today at 2pm we had to turn on the lights because it was so cloudy and dark. The 10kWp of solar on my roof produced 2kWh today.

I agree that most indoor lights are not bright enough, but that's mainly because there hasn't been an easy way to regulate them. There's no reason why you can't light your living space to 500 or more lux (most living rooms are barely 150 lux) at 6500k and regulate it down at night, and something like this makes it easy to do.