The Norman Lamps 50ARS-34V is a 50W, 34V incandescent A19 light bulb built for low-voltage electrical systems that require a standard E26 medium screw base. Designed to operate specifically at 34 volts, this bulb is engineered for specialty applications such as locomotive headlights, railway equipment, off-grid power systems, and other industrial or commercial environments where 34V circuits are standard.

The frosted glass finish diffuses light evenly, reducing glare and producing a soft, uniform illumination. The classic A19 form factor measures 4.10 inches in length and 2.38 inches in diameter, conforming to standard A19 dimensional specifications and allowing for straightforward installation wherever an E26 socket is present within a compatible 34V system.

This incandescent A19 bulb carries a rated average life of 2,500 hours and is fully dimmable, making it suitable for applications where light level control is needed. As a low-voltage, specialty incandescent lamp, it is exempt from U.S. Department of Energy general service lamp efficiency regulations under 10 CFR 430.2, which defines general service lamps as those operating at specific voltage ranges that do not include 34V. This exemption ensures continued availability for the specialized systems that depend on this voltage.

These lamps are DOE exempt. 

The lamps are designed and operate at 34 volt. Therefore, they meet the requirement for the relevant exception.

The ruling:  https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-A/section-430.2

General service lamp

"means a lamp that has an ANSI base; is able to operate at a voltage of 12 volts or 24 volts, at or between 100 to 130 volts, at or between 220 to 240 volts, or of 277 volts for integrated lamps (as defined in this section),"

The 50ARS-34V is sold as a single unit and is the correct replacement for fixtures and equipment engineered around 34V incandescent A19 lamps with an E26 base.

• 50W 34V incandescent A19 bulb with E26 medium screw base — purpose-built for low-voltage specialty systems
• Frosted glass finish for soft, glare-reduced light output and even illumination
• Rated 2,500 average life hours; fully dimmable for flexible light level control
• Standard A19 dimensions: 4.10 in. length x 2.38 in. diameter — fits E26 sockets in 34V-rated fixtures
• DOE-exempt specialty incandescent: 34V operation falls outside the general service lamp definition under 10 CFR 430.2
• Sold individually — ideal as a direct replacement for locomotive, railway, off-grid, and other 34V incandescent applications

Tags: 50a19/34v, low, voltage