Opsins highlight the design flaws of LED lights

The key wavelengths for human health are missing from most LEDs

If you want to know which wavelengths of light are most important for sustaining human health, look at the opsins. These light-sensitive proteins are a key component of the photopigments in the eye. Each detects specific wavelengths of light and triggers specific physiological responses.

Bound to a light-absorbing molecule called retinal, each opsin pr…