The Norman Lamps 60A19/FR-277V is a 60W incandescent A19 light bulb engineered specifically for 277V high-voltage commercial and industrial electrical systems. Operating on the phase-to-neutral voltage derived from standard 480V three-phase power infrastructure, this bulb is the correct choice for offices, warehouses, retail spaces, and other large-scale facilities wired for 277V circuits — no step-down transformer required.

The frosted glass envelope delivers soft, evenly diffused incandescent light that eliminates harsh glare and hotspots, making it well suited for general ambient lighting in commercial environments where visual comfort matters. As an incandescent source, it produces warm white light with excellent color rendering, rendering colors naturally and accurately across the visible spectrum.

Built to handle the demands of commercial installations, this A19 incandescent bulb features a rough service construction with a brass base for added durability and reliable socket contact. The E26 medium screw base provides straightforward installation into any standard E26 socket rated for 277V operation. The bulb measures 4.10 inches in length and 2.38 inches in diameter, conforming to the standard A19 form factor. It is fully dimmable and compatible with appropriate 277V dimming controls. Rated average life is 2,500 hours.

• 60W incandescent A19 bulb rated for 277V high-voltage commercial and industrial circuits — no transformer required
• Frosted glass envelope provides soft, glare-free diffused light for comfortable general ambient illumination
• E26 medium screw base with brass construction for secure, corrosion-resistant socket contact
• Rough service design adds durability for demanding commercial installation environments
• Fully dimmable with compatible 277V dimming controls
• Standard A19 form factor: 4.10 in. length x 2.38 in. diameter, rated 2,500 average life hours

Tags: 60a19/fr-277v, (277v)