An S19 incandescent bulb is a larger, rounded bulb typically used in decorative and commercial lighting applications where a more prominent bulb and higher brightness are desired.

Key Characteristics:

• Shape and Size: The "S" stands for "Sign" bulb, and "19" means the bulb has a diameter of 19/8 inches, or 2.375 inches (60.3 mm).
• Applications: S19 bulbs are often found in vintage-style fixtures, commercial signs, marquee lighting, restaurants, and retail displays. They’re popular in environments aiming for a bold, visible light source.
• Voltage and Base Options: Available in different voltages, like 120V or 240V, S19 bulbs typically have an E26 (medium) or larger E27 base, which fits into standard light sockets.
• Light Output: S19 bulbs produce a relatively high light output compared to smaller sign bulbs. They come in incandescent, LED, and filament LED options. Incandescents provide warm, natural light, while LEDs offer energy efficiency and a range of color temperatures.

With their large size and bold appearance, S19 incandescent bulbs are used in both functional and decorative lighting setups, making a statement in any space they illuminate.