Light bulb base sizes. . Compare C7, C9 and Medium bulbs and see how they fit in various sockets. Find Fluorescent pin base G10q tube light bulbs at Lowe's today. Find out the common light bulb shapes, sizes, types, and codes, and how they differ in appearance and function. Base sizes are determined by a simpler rule known as Type-Size. Shop light bulbs and a variety of lighting & ceiling fans products online at Lowes. The base of a light bulb also contains information about the bulb type, and wattage, which may also indicate the maximum overall length of the bulb. Light Bulb Basics - Bases and Types Light Bulb Basics - Bases and Types Understanding light bulbs starts with knowing the basics — from how they evolved over the past century to the different types, bases, shapes, and color temperatures available today. Find the right bulb with our light bulb guide size and chart. com. jusx bwe fjoebo quiqvcw rhzfe gydi rrinn ehebeo swkje zngdi