The Nightwarm blog

Warm screens & better sleep

Practical, no-nonsense writing on blue light, macOS display quirks, and protecting your sleep — from the team that built Nightwarm.

Featured · macOS · 6 min read

Why macOS Night Shift only warms your main display

The technical reason external monitors stay blue at night — and why Apple still hasn't shipped a fix after years of bug reports.

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Sleep · 8 min read

Blue light and sleep: what the research actually says

Melatonin, circadian rhythm, and evening screen exposure — separating the solid science from the marketing hype.

Guide · 5 min read

How to fix Night Shift on dual monitors (Mac)

A step-by-step walkthrough to get consistent, warm color temperature across every screen on your desk.

Basics · 4 min read

Kelvin, warmth, and your screen: color temperature explained

What 6500K, 4000K, and 1900K actually mean — and which one your eyes want after sunset.

Compare · 7 min read

Nightwarm vs f.lux vs Lunar: which warms every display?

An honest look at the three most common ways Mac users warm their screens — and where each one falls short.

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