YOUR BODY RUNS ON SUNLIGHT.
For millions of years, one light set your internal clock: the sun. Its color changes across the day and your brain listens to every shift.
Each TrueDark lens is engineered to match one phase of that cycle. Letting through only the colors of light the sun would give you at that time of day.
DAYTIME LIGHT.
Mid-morning – early eveningMidday sun is rich in every color. But your screens and overheads push far more harsh blue than the sun ever would. Daylights filter most of that excess blue while letting the energizing colors of daylight through.
Daylights lenses pass green, yellow, orange, and red light — the make-up of natural daytime sun — while filtering the harsh blue that drives eye strain and fatigue.
SUNSET LIGHT.
Early eveningAs the sun drops, blue and green light fade and the sky turns amber and red. That shift is the signal that starts your wind-down. Sunsets recreate it, no matter what lights are on around you.
Sunsets lenses shut out blue and violet light, hold back most green, and pass the warm amber and red of a natural sunset — cueing melatonin to rise.
TWILIGHT.
30 min before bedAfter sundown, your body expects near-darkness. Only the faint red of firelight. Twilights recreate that darkness for your brain even with every light in the house on.
Twilights lenses block blue, green, and violet light almost completely, passing only red — the one color that lets melatonin flow and brainwaves shift toward deep-sleep delta.
JUNK LIGHT DOESN'T FOLLOW THE SUN.
Screens, LEDs, and overhead lighting blast the same blue, green, and violet light all day and all night. At 11pm, your phone is telling your brain it's noon.
That constant junk light suppresses melatonin and keeps your brain in "go mode." Blocking it before bed matters most — which is why Sunsets and Twilights, worn for just a few hours each night, do some of the heaviest lifting for your sleep.