There is a reason restaurants turn their lights down, and it isn't just to set the mood. A study by the University of California-Irvine concluded that dark rooms lead to more binge eating since people tend to feel less inhibited in the dark. A well-lit kitchen will make for more careful food prep and may discourage snacking. Bright lights (and natural light) throughout the house will also keep your energy levels up, although if the lighting is too bright your energy will be so high you'll eat faster and consume too much before you know you're full. So consider moderating the lighting to somewhere between romantic restaurant and blinding cafeteria.