Sleep glossary
lux
Updated
In wake-up lights, lux helps describe brightness, but placement and distance change what reaches your eyes.
Plain-English definition
Lux is a unit for measuring illuminance, or how much light reaches a surface.
In wake-up lights, lux helps describe brightness, but placement and distance change what reaches your eyes.
Why it matters
A headline brightness number is only useful if the lamp position and dimming range suit your bedroom.
Buying relevance
Use this term as a practical buying clue, then check the current manufacturer wording, setup guidance, materials, and returns policy. It should not be treated as a medical claim or a guarantee of how a product will work for you.
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