3 ms·
Is UV 400 necessary? I don't think anything under 380nm goes through glass. But for the most I believe it vastly more practical to put on sunglasses if there i
by raxxorraxor 4y ago
Is UV 400 necessary? I don't think anything under 380nm goes through glass.
But for the most I believe it vastly more practical to put on sunglasses if there is too much light than needing floodlights in the night. Because then you want every photon get through your windows.