Globe shaped light bulbs often function like fixtures. The number following the “G” indicates the diameter of the bulb in 1/8 inch increments. A G25 bulb, for example, has a 3.12 inch diameter.Click to see full answer. Accordingly, what are g25 bulbs used for?G-Shape LED globe bulbs are used in a variety of applications where a decorative ball shaped light source is required such as ceiling fans, accent fixtures, or as LED vanity bulbs for bathroom vanities.Also Know, what does s11 bulb mean? The Philips 40-Watt S11 High-Intensity Light Bulb features an S11 shape and an intermediate base for indoor commercial and residential use. This high-intensity light bulb uses 40-Watt and is rated for 500-hours of use. This Philips bulb is Ideal for indoor, residential use. Brightness: 440-Lumens. Also asked, what does g25 mean? Globe Light Bulbs – G25 Incandescent Available in a variety of wattages, Lumen outputs, and brands, you’re sure to find the decorative globe bulb to suit your needs. These G25 incandescents are 3.125 inches in diameter and have several base type options.What is a g40 light bulb? Globe Light Bulbs – G40 Incandescent Five inches in diameter, these G40 incandescent light bulbs are designed primarily for use in decorative fixtures. They can be used in enclosed fixtures, but they are often used in open fixtures to display their spherical design.