Question 1

How does the light meter estimate lux?

Accepted Answer

It captures a frame from your camera and computes the average pixel brightness, which is then mapped to an approximate lux value. The reading is calibrated against typical office lighting conditions.

Question 2

How accurate is it?

Accepted Answer

The estimated lux is approximate, since webcams are not calibrated lux sensors. It's great for relative comparisons (brighter vs darker) and general lighting checks, but not for professional photography metering.

Question 3

What is a good lux for reading?

Accepted Answer

For comfortable reading, 300-500 lux is recommended. Office work needs 500 lux, while detailed tasks like drafting need 1000+ lux. Outdoor sunlight can exceed 100,000 lux.

Question 4

Is the camera feed private?

Accepted Answer

Yes. The camera feed is processed entirely in your browser using Canvas API. No images or video are ever sent to any server — 100% private.