GE 12471 | HR100A38/O ED23.5 100W Mercury Vapor HID Lamp E39 Mogul Base

The GE 12471 (HR100A38/O) is a commercial-grade 100W high-intensity discharge (HID) mercury vapor lamp engineered for high-ceiling industrial facilities, warehouse bays, roadway corridors, and heavy-duty outdoor security fixtures. Outfitted with a heavy-duty E39 Mogul screw base and a classic ED23.5 clear glass envelope, this high-output bulb delivers a sharp, alert 5700K Daylight color profile. Operating under an ANSI H38/O system classification, it generates 3,850 initial lumens of high-intensity illumination across an exceptional 20,000-hour rated service lifespan. Designed for high system versatility, it features a universal burning position layout, allowing clean, stable operational metrics inside both open-frame canopy structures and fully enclosed, sealed industrial luminaires.

High-Intensity HID Output and Universal Orientation Flexibility

GE Lighting’s mercury vapor HID lamps are engineered to maintain high lumen retention and durable electrical arcs over large facility footprints. The clear ED23.5 bulb design ensures unrestricted light transmission, projecting a crisp 5700K white light that maximizes nighttime visibility and situational awareness in critical security zones. Built with a highly resilient internal arc tube, this lamp supports a universal burning position, enabling vertical, horizontal, or angled mounting configurations without sacrificing structural stability, ignition safety, or color consistency across the entire 20,000-hour system life cycle.

• Universal Burn Position: Installs into any physical orientation configuration without restricting arc performance, maximizing fixture hardware compatibility.
• Extended Maintenance Cycle: Features a 20,000-hour rated service lifetime, drastically reducing the frequency of hazardous high-ceiling relamping tasks.
• Open or Enclosed Fixture Rated: Certified to operate safely in open-air industrial frames or within sealed, weatherproof exterior outdoor perimeter housings.
• Robust E39 Mogul Screw Base: Heavy-gauge brass screw threads resist heat vibration and micro-arcing inside demanding industrial lighting environments.

Comprehensive Technical Specifications

• Brand: GE Lighting
• Product Code / NAED: 12471
• Ordering Abbreviation: HR100A38/O (100W Mercury Vapor)
• Technology Type: High-Intensity Discharge (HID)
• Chemical Classification: Mercury Vapor
• Nominal Wattage: 100W
• ANSI System Code: H38/O
• Bulb Shape Configuration: ED23.5 (Elliptical Dimpled, 2.937-Inch Face Diameter)
• Bulb Glass Finish: Clear / Transparent
• Base Type: E39 Mogul Screw Base
• Initial Luminous Flux: 3,850 lm (Measured after 100 runtime hours)
• Mean Luminous Flux: 2,695 lm (Measured at 40% of average rated lamp life)
• Color Temperature: 5700K (Daylight Spectrum)
• Color Rendering Index (CRI): 15
• Average Rated Lifespan: 20,000 Hours
• Operating Burning Position: Universal (All structural mounting angles)
• Maximum Overall Length (MOL): 7.50 Inches (190 mm)
• Bulb Outer Diameter (DIA): 2.937 Inches (74.6 mm)
• Universal Product Code (UPC): 043168124713
• Fixture Safety Class: Approved for Open or Enclosed Rated Fixtures

System Integration, Ballast Matching & Safety Protocols

• Ballast Matching Requirements: This mercury vapor bulb is engineered strictly for ANSI H38 circuit architectures. Never connect this module directly to main line voltages (120V/277V) without a corresponding step-down electromagnetic HID ballast. Operating this bulb on mismatched ballast types (such as Metal Halide or High-Pressure Sodium lines) will cause thermal stress, severe flicker, or explosive arc failure.
• Electrical Interlocking: Always disconnect the primary power feed line at the circuit breaker box before attempting inspection, structural maintenance, installation, or physical bulb extraction.
• Wet-Location Operations: While this bulb safely supports open-air layouts, do not expose the raw glass shell directly to outdoor moisture or active rain lines unless protected inside a weather-sealed, properly enclosed architectural housing.
• Handling Post-Breaker Guidelines: Allow the fixture to cool completely before physical extraction. High-wattage HID systems run at intense thermal limits that can cause severe contact burns. If the outer glass structure breaks, immediately cut power to eliminate exposure to UV radiation and electrical arc fields.

Recommended Industrial & Commercial Applications

• Industrial and Warehouse Logistics: Provides durable, long-life overhead workspace illumination inside manufacturing lines, machine shops, and high-clearance shipping depots.
• Parking Lots & Roadway Corridors: Excellent replacement bulb for municipal roadway poles, loading dock canopies, and commercial property perimeter posts.
• Security and Area Floodlights: Perfect for casting a bright daylight white safety footprint across industrial perimeters, equipment yards, and commercial entry gates.