Globe Bulb Comparison: G25 vs G30 vs G40 vs G50 (Chart & Dimensions)
When it comes to choosing the right globe bulb for your lighting needs, it’s easy to feel overwhelmed with options like the G25, G30, G40, and G50. Choosing the right bulb shape is overwhelming; now you have to choose what type of G bulb to use. Do not worry, at Thunder Lighting Supply, we’re here to break it all down for you so you can make an informed decision. Let’s dive into what sets these bulbs apart, their sizes, and their practical applications.
Understanding the Globe Bulb Sizes
Globe bulbs are iconic for their round shape and versatile applications, from decorative lighting to landscape spaces like pergolas or patios. The numbers in the bulb names, like G25 or G50, refer to their diameter in eighths of an inch.
G25 vs G30 vs G40 vs G50 Bulb Comparison
One of the most common questions we hear is about the differences between these globe series bulbs. It’s not just about the size—though that’s a big factor—but also about the overall impact they have on your lighting setup.
Having a globe bulb-size chart on hand can make the decision-making process much easier. Here’s a simple comparison:
| Bulb Type | Diameter (Inches) | Common Uses |
| G25 | 3.125 | Vanities, pendant lights |
| G30 | 3.75 | String lights, accent lights |
| G40 | 5.0 | Chandeliers, decorative displays |
| G50 | 6.25 | Large fixtures, outdoor lighting |
Note: These are just the common sizes from the Globe series.
When to Choose Each Bulb Size
- G25 Bulbs → Small and subtle, great for close-up lighting like bathroom mirrors or desk lamps.
- G30 Bulbs → Slightly bigger, ideal for bistro string lights and small outdoor seating areas.
- G40 Bulbs → A versatile statement size — bold enough to stand out, not so large that it dominates.
- G50 Bulbs → The largest standard globe bulb, perfect for grand, open spaces and impactful displays.
Pro Tip: In outdoor settings, bulbs look smaller against the open sky. If in doubt, size up.
The Difference Between G40 and G50 Bulbs
If you’re torn between G40 and G50 bulbs, the primary difference is the size. G40 bulbs measure 5 inches in diameter, while G50 bulbs are larger at 6.25 inches. This difference might seem small, but in practice, it can greatly impact the overall aesthetic of your lighting. G50 bulbs are best for large, open spaces or bold statement fixtures, while G40 bulbs work well in medium-sized areas.
The G40 bulb is particularly popular due to its versatile size. Measuring 5 inches in diameter, it offers a bold look without being too oversized. The wattage can vary widely depending on the type of bulb you choose. LED G40 bulbs are energy-efficient and long-lasting, typically ranging from 1W to 5W, while incandescent G40 bulbs are brighter but consume more energy, with wattage options from 15W to 60W.
G40 vs G50 – What’s the Difference?
G40 → 5-inch diameter
G50 → 6.25-inch diameter
That extra 1.25 inches might sound small, but visually, it makes a big difference.
- Choose G40 for medium-sized spaces, dining areas, or patios where you want impact without overpowering.
- Choose G50 for large rooms, commercial installs, or outdoor displays where you want maximum visual drama.
Choosing the Right Bulb for Your Needs
When selecting a bulb, think about the space and the desired effect. Are you aiming for a cozy ambiance or a striking focal point? Smaller bulbs like G25 and G30 are subtle and blend well into most settings, while larger options like G40 and G50 create a more dramatic effect. If you’re still unsure, reach out to us at Thunder Lighting Supply for personalized recommendations.
How to Pick the Right Globe Bulb
To measure your fixture for a globe bulb like G25, G30, G40, or G50, you want to make sure the bulb will physically fit and look right.
1. Measure the Fixture Opening: If it’s open (like string lights or an exposed socket), measure from the center of the socket to the nearest edge or obstruction. If it has a shade or cover, measure the inside diameter of the opening where the bulb will go. Make sure the bulb’s diameter is at least 0.5″ smaller than the opening for clearance.
- Check the Depth: Measure from the socket base to the inside surface of the shade or cover (front to back). Compare this to the bulb’s overall length (diameter + base height). If the bulb is too long, it may stick out or press against the shade.
- Identify the Socket/Base Type: Look at the metal screw part of your current bulb or fixture socket.
Common globe bulb bases:
- E12 (Candelabra) → Smaller screw base, common in decorative fixtures.
- E26 (Medium) → Standard household screw base.
- Consider Aesthetics: Even if it fits, you want it to look balanced:
- In small fixtures, large bulbs like G50 may overwhelm.
- In large outdoor string lights, small bulbs like G25 might look underwhelming.
Why Choose Thunder Lighting Supply
At Thunder Lighting Supply, we’re committed to providing high-quality globe bulbs at wholesale prices. Whether you need G25 bulbs for a vanity setup or G50 bulbs for a grand outdoor display, we’ve got you covered. Explore our extensive collection, and let us help you find the perfect lighting solution for your project.
Ready to transform your space? Contact us today to learn more about our globe bulbs and other lighting products.
