The science
Your eyes evolved for daylight, not a screen at arm’s length.
Our eyes evolved under the balanced spectrum of daylight. Screens and LEDs are not balanced: they spike in high-energy blue light, far more concentrated than our visual system was built for, and over long sessions that can overstimulate it. Daytime works on three things.
DaytimeYellow lens
What reaches your eyes from a 5000K LED, with and without the lens
Independently verified by APR Laboratory (NATA #15508)
Unfiltered source modelled as a 5000K white LED. Lens curves from independently verified data.
Daytime yellow lens. Filters 82% of high energy blue light. 78.6% of all light passes through.
The science
Our eyes evolved under the balanced spectrum of daylight. Screens and LEDs are not balanced: they spike in high-energy blue light, far more concentrated than our visual system was built for, and over long sessions that can overstimulate it. Daytime works on three things.
Daytime supports focus and clarity through long screen days.
See the full verified results






