The Different Size Light Bulb Bases Explained: 1 Minute to Understand Your Lighting OptionsSarah ThompsonMay 24, 2025Table of Contents1. E26 Base:2. E12 Base:3. E17 Base:4. GU24 Base:5. B22 Base:FAQTable of Contents1. E26 Base2. E12 Base3. E17 Base4. GU24 Base5. B22 BaseFAQFree Smart Home PlannerAI-Powered smart home design software 2025Home Design for FreeChoosing the right light bulb involves more than just brightness; understanding light bulb base sizes is vital for ensuring compatibility with your fixtures and maximizing performance. The base acts as the connecting point between the bulb and the socket, and different types serve various applications. Here’s an overview of the common light bulb base types you'll encounter: 1. E26 Base: The E26 base, recognized as the standard medium base, is prevalent in the United States, measuring 26mm in diameter. This base suits a wide array of household light fixtures, making it incredibly versatile. Opt for E26 bulbs when you're seeking general-purpose lighting solutions. 2. E12 Base: Smaller than the E26, the E12 base or candelabra base has a diameter of 12mm. Typically used for decorative purposes, such as in chandeliers and wall sconces, the E12 base can add a stylish touch to your home's lighting design. 3. E17 Base: Measuring 17mm in diameter, the E17 base is commonly found in appliance bulbs as well as some recessed lighting options. If you’re looking for lighting specifically for appliances requiring unique bulb types, the E17 base provides the perfect fit. 4. GU24 Base: The GU24 base distinguishes itself with a twist-and-lock mechanism designed for energy-efficient CFLs and LEDs. This innovative design prevents bulb rotation, enhancing security in modern, eco-friendly lighting installations. 5. B22 Base: Known as the bayonet base, the B22 measures 22mm in diameter and is prevalent in many regions outside the United States. The base employs a push-and-twist technique to secure bulbs, making it a favored choice among specific lamp types for its reliable fit. By familiarizing yourself with these various light bulb base sizes, you’ll be better equipped to select the appropriate lighting fixtures for your home. Whether you’re updating existing designs or exploring new options, matching the bulb base to the socket is crucial for ensuring efficiency and performance. How do you envision enhancing the lighting in your space? FAQ Q: What is the most common light bulb base size?A: The E26 base is the most common light bulb base size in the U.S., suitable for a wide range of fixtures. Q: Can I use different base types in the same fixtures?A: No, each bulb base type is designed for specific fixtures, so using the wrong base can lead to compatibility issues.Home Design for FreePlease check with customer service before testing new feature.