Utilities, lighting manufacturers and government agencies sometimes offer rebates on LEDs to take some of the sting out of the bulbs' high prices. Lehrman recommends checking the websites of bulb makers and local utilities as well as looking at the Database of State Incentives for Renewables & Efficiency. Save your receipts for warranty purposes
Any LED that carries a U.S. government EnergyStar rating for efficiency must include at least a three-year warranty, and some manufacturers warrant their bulbs for as much as a decade. Lehrman recommends you keep your receipt and the box your LED came in so you have it available in case the bulb suffers a premature death. An even better idea: Take photos of the receipt and the box's UPC code with a smartphone, then store them on your phone or download them to your computer for easy retrieval.