BA9S LED's are high brightness LED bulbs with industry standard BA9S bayonet bases. They will fit into any standard 22 mm or 30 mm pilot light that accepts BA9S bulbs. Their solid state design and long life makes incandescent bulbs a thing of the past. LED BA9s are available in industry standard colors and voltage ratings and allows LED upgrade from the front of the panel without having to open the door. High brightness single LED chip. Flat top provides superior light dispersion. Will fit most pilot lights and illuminated devices. Low energy consumption (20 mA). Cooler operation. Give off less heat. Reduced maintenance costs. Long Life (excess of 30,000 hours). Immune to vibration.