In Downingtown, the light from the 672-square-foot display screen shines into some residents' homes along North Lake Drive and Farmhouse, tree-lined, pastoral streets of modest houses. One resident complains she feels like she's living near a drive-in movie; another couple says they installed black curtains on their 2-year-old's bedroom window, lest the lights keep her awake; a developer who plans to build 70 townhomes in the area says the billboard outshines the Las Vegas strip. Real estate agents say homes caught in the glow could lose value.