Horizn · Guides
Light, sleep, and waking well.
Practical, no-hype answers to the questions we kept asking while building a sunrise alarm. Written by the person who wakes up to one every morning.
July 27, 2026
How Bright Should a Sunrise Alarm Be? Lux Explained
Aim for roughly 250-300 lux at your pillow, not the number on the box. How distance, room geometry, and gamma correction decide whether a sunrise alarm works.
Read the guide → July 27, 2026How to Choose a Sunrise Alarm Clock: 5 Criteria
The five specs that matter in a sunrise alarm, brightness at your pillow, ramp quality, app lock-in, outages, longevity, from a builder who owns the top pick.
Read the guide → July 19, 2026Do Sunrise Alarm Clocks Actually Work?
An honest look at what dawn-simulation research supports, what sunrise alarms can't fix, and the mechanics that separate a good sunrise from a bad one.
Read the guide →