A New Breed of Home Marijuana Grower California -- Joanne Clarke, a legal secretary in her late 50s, leads the way down a pale green hallway in her modest Costa Mesa home, past a small guest room on the right and a blue tiled bathroom on the left. At the end of the hall, she opens a door, pushes aside a thick black curtain and ducks inside. "Isn't this wild?" she says, gesturing to the high-tech marijuana grow room she and her husband recently installed. "This used to be my daughter's bedroom." Wild is one word for it. Bright is...