Light Bulb Shapes & Sizes Guide: A19, ST19, G25, B11, E26, E12 Explained
TL;DR — Quick Answer A19 / ST19 / G25 / B11 = bulb shape (how it looks and where it’s used). The number (like 19 in A19/ST19) is the diameter...
Practical guides to help you choose the right bulb shape, brightness, color temperature, and lighting style for every room and fixture.
Begin with the core buying guides for bulb size, brightness, base type, and light quality.
Find lighting ideas for dining rooms, restaurants, kitchens, chandeliers, sconces, bedrooms, and bathrooms.
Compare A19, ST19, G25, B11, BA11, E26, and E12 options for your fixtures.
Choose the right color temperature and mood, from amber glow to warm white and daylight.
Solve flicker, dimmer compatibility, glowing bulbs, and other common LED questions.
Understand energy savings, wattage equivalents, lifespan, and when premium LED bulbs are worth it.