One common home improvement mistake is falling in love with unique or lavish light fixtures, said Alon Barzilay, founder of real estate development company Barzilay Development.“Whether it be ceiling-mounted lights in a dining room or a hanging pendant, there is a psychological phenomenon that happens when you go to a lighting store … you're going to pick something exciting and new instead of picking a new addition that suddenly matches the big picture,” Barzilay said.Furthermore, the passage of trends works against homeowners. “Whatever is in vogue today will look dated 10 years down the road when you are ready to sell," he added. "Simple is best. Fortunately, lighting can easily be switched out at a low cost."