19Mistake: Letting too much light in while trying to sleepHang this popular blackout curtain in your bedroom to block up to 99.9% of the sunlight that’s disrupting your sleep or nap time. The curtain panel features a practical rod pocket design and it’s machine-washable for easy care. In addition to blocking light, it also keeps heat out in the summer, keeps cool air out in the winter, and helps reduce unwanted noise. Solution: Popular blackout curtains that blocks up to 99.9% of light