Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C78.1-1978 found under Lamp Fluorescent by American National Standards Inst. The National Stock Number assigned to this part is 6240009824522, and the Federal Supply Class is 6240 Electric Lamps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like C78.1-1978.