The verdict
A daytime screen lens, not a sleep lens. It blocks 36% of body-clock light, but 46 lenses block more, and under a warm 2700K bulb about 69% still gets through.
It will not protect melatonin at night. Think of it as a screen-comfort lens for the daytime.
Sleep strength
Minimal
36% melanopic blocked
#47 of 61 lenses
Clarity
Clear
87% of visible light passes
#13 of 61 lenses
Tint
Light yellow
Blocks below 462 nm
Colors shift slightly warm
Red + near-IR
Passes
91% of 600 to 950 nm
Long wavelengths get through
Under your lights
Pick a light to see what the lens lets through.
How the world looks through it
Drag the handle. Left of the line is through the lens.
With lensWithoutSimulated from the lens's measured color. A lens that blocks blue and green darkens cool colors and keeps warm ones.
Where it ranks
All 61 lenses. Up blocks more body-clock light, right is clearer. The best tradeoffs sit on the green line. Tap any dot.