Reduce light leakage Say goodbye to annoying gaps! Our light blocking strips seal edges completely, blocking 95% of side light for pitch-dark rooms. Perfect for light-sensitive sleepers, shift workers, or creating a home theater experience. Sleep deeper and protect your privacy effortlessly. Trim to Fit in Seconds The window light blocker are available in 58 inches for most length requirements, simply cut the strips to fit the window size. Simply cut with sturdy kitchen scissors or a hacksaw. Minimize Light, Maximize Style Get Better Blackout and a Perfect Match.