LED bulbs in exit signs offer great energy savings, low maintenance costs, and improved safety. These TCP exit sign retrofit bulbs should not need to be replaced for at least 10 years. Each bulb contains 40 red diodes and a patented swivel base to allow the bulb to be positioned for maximum light output. The bulbs are made to UL 924 specifications. One retrofit set includes two bulbs with candelabra bases, two bayonet adapters, and two intermediate adapters.