Photoreceptors are not sensitive to red light, requiring increased brightness or more lights to see effectively in red-only environments.

“why is red light a problem well our photo receptors are not sensitive at all to Red Light uh so when you have this very isolated red light wavelength I mean anyone who has gone full red mode on their phone or wearing blue light blockers you know like this you you can't really see super well so what do you have to do you have to end up like turning up the brightness a little bit or need more lights typically”