The 388 is a 28V Incandescent Lamp with midget grooved metal base. The 0.3 mean spherical candle power, T6 (T-1-3/4) base and 7000 hours average bulb life. This unique lamp is purpose built to provide the high light output and specified light distribution patterns required in both commercial and private aircraft. This high quality lamp features unsurpassed durability and consistency for demanding aircraft requirements.