We did a little informal demonstration to better illustrate how much light blackout lined custom curtains and drapery eliminate. The following photo is shot on a single window with two linen drapery panels. One of the curtains was made with blackout lining and one was made with standard privacy lining. The photo was shot on a hot and sunny afternoon. The difference between the two curtain panels is quite dramatic. When you see how much of the light is blocked by the blackout lining (95%) you really get a better understanding how using quality blackout lined curtains, drapery or roman shades would significantly lower you homes energy bills and save your interior upholstery fabrics from sun damage. At DrapeStyle we encourage the use of blackout lining whenever the application is appropriate. It certainly adds weight to the drapery but if you are using quality drapery hardware blackout is really the way to go when buying your next pair of custom drapery or curtains.