Allegedly, Walmart was unjustly enriched by the sale of the falsely advertised light bulbs. Pargett claims that had he known that the light bulbs were not as energy efficient as advertised, he would not have purchased them or would not have paid as much for them. He says that he was denied the benefit of his bargain. The Walmart light bulb class action lawsuit says that Walmart's conduct violates California law, and that the retailer committed fraud and breached both expressed implied warranty with its customers.