A lot of light at night—for example, from screens or streetlights—can lead to health harms, according to experts including Harvard Chan School's Eva Schernhammer.
The blackout curtains/sun block curtains I’ve recently seen use sticky tape and velcro to block out virtually all light. I’ve done it, but you have to have someone somewhat tall (I’m 5’11) to get the corners. They use a solid block of fabric, not blinds, to block out everything.
The blackout curtains/sun block curtains I’ve recently seen use sticky tape and velcro to block out virtually all light. I’ve done it, but you have to have someone somewhat tall (I’m 5’11) to get the corners. They use a solid block of fabric, not blinds, to block out everything.