The verdict
A daytime lens. It blocks 75% of body-clock light, but 31 lenses block more, and under a warm 2700K bulb about 36% still gets through.
It will not protect melatonin at night. Think of it as a screen-comfort lens for the daytime.
Sleep strength
Partial
75% melanopic blocked
#32 of 61 lenses
Clarity
Light tint
78% of visible light passes
#22 of 61 lenses
Tint
Strong yellow
Blocks below 517 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.
Beat it on both
No lens I have tested blocks more and is clearer. This one sits on the best-tradeoff line.