Aldo DeRubeis bought compact fluorescent bulbs on Monday at the Home Depot in New Rochelle, N.Y. Sales of compact fluorescents climbed to 75 million last year for the retailer. Recycling them is about to get easier. Home Depot, the nation's second-largest retailer, will announce on Tuesday that it will take back old compact fluorescents in all 1,973 of its stores in the United States, creating the nation's most widespread recycling program for the bulbs.