DS wakes early and I want to eliminate light being a cause. We moved into a new house in November and spent £1000 on blinds, none of which are blackout. DS will sleep in his room in daytime without even the curtains closed but I am not convinced the morning light is not contributing to him waking between 5.30 & 6am. Can you get backing sheets for blinds to make the original blinds more effective at blocking out light? Or any suggestions on a strategy to try out before I find myself replacing the blind for blackout at more cost.