Light

Lumens and lux are two different things. Lumens are a measurement of total light, while lux measure total light energy falling on a surface of a certain size.

Light therapy lamps are advertised as 10k lux, but in the footnotes it's measured at 4" away. That's why "sunrise" lamp alarm clocks need to be close to your bed.

Numbers:

- Sunlight - 10,000 to 120,000 lux

- Light Therapy lamp (from 4 inches away) - 10,000 lux

- 60W Philips Hue light bulb (800 lumens, 120deg beam angle, 4in away) - ~25,000 lux

- 60W bulb (same specs, but 5ft away) - ~100lux

Numbers for the 60W light bulb are also optimistic, and go down if you put it in a light fixture that doesn't redirect all of the light into a 120deg beam (like a regular standing lamp).