GE 175W Mercury Vapor Lamp – H39/O ANSI | 3900K Deluxe White | 7800 Lumens | E28 Coated | E39 Mogul Base | 20,000-Hour Life

The GE HR175A39 is a 175-watt Deluxe White mercury vapor HID lamp in a coated E28 bulb shape delivering 7,800 initial lumens at 3900K. H39/O ANSI classification, E39 mogul screw base, universal burn position, and 20,000-hour rated life make this a direct replacement lamp for compatible 175W mercury vapor fixtures in commercial and industrial outdoor, security, parking, and high-bay applications.

Quick Specs

• Brand: GE Lighting
• Lamp Code: HR175A39
• Lamp Type: Mercury Vapor HID — Deluxe White
• Wattage: 175W
• ANSI Code: H39/O
• Color Temperature: 3900K
• CRI: 50
• Initial Lumens: 7,800 lm
• Mean Lumens: 6,630 lm
• Bulb Shape: E28 (Coated)
• Base Type: E39 Mogul Screw Base
• Burn Position: Universal
• Fixture Compatibility: Enclosed Fixtures Only (see safety notes)
• Overall Length (MOL): 8.25 inches
• Diameter: 3.5 inches
• Rated Life: 20,000 hours

Product Overview

The GE HR175A39 is a 175-watt Deluxe White coated mercury vapor lamp using H39/O ANSI classification — the standard electrical designation for 175W mercury vapor sources. The coated E28 bulb shape delivers a softer, more diffused light distribution than clear mercury vapor lamps, making the HR175A39 appropriate for enclosed area lighting fixtures where the outer coating both filters light and provides UV containment as a secondary layer.

Initial lumens of 7,800 decrease to a mean of 6,630 at the midpoint of the 20,000-hour rated life. The 3900K Deluxe White designation produces a warmer-appearing white light than standard clear mercury vapor, with the coated phosphor layer improving color rendering slightly above bare arc mercury vapor sources.

Universal burn position allows installation in any orientation without affecting lamp performance or rated life. The E39 mogul screw base is standard for 175W mercury vapor commercial fixtures. This lamp must be used in an enclosed fixture — do not use in open fixtures or where directly exposed to moisture.

Why Choose This Product

• H39/O ANSI classification — direct ballast match: The H39/O ANSI code identifies the specific electrical operating parameters for 175W mercury vapor operation. Confirm your ballast and fixture carry the H39 designation — H39 and H38 (100W) are not interchangeable.
• 7,800 initial lumens at 175W: Full 175W mercury vapor output level for large-area commercial and industrial fixture installations.
• Deluxe White coated bulb: Phosphor coating improves color appearance compared to standard clear mercury vapor, producing a warmer 3900K light quality with slightly better color rendering than uncoated sources.
• 20,000-hour rated life: Long service life reduces replacement frequency in hard-to-access outdoor fixtures such as area lighting poles, high-bay industrial installations, and outdoor security systems.
• Universal burn position: Installs in any fixture orientation without affecting lamp performance or service life.
• E39 mogul base — industry standard: Standard mogul screw base for 175W HID commercial fixtures — straightforward physical replacement in compliant housings.

Technical Specifications

Dimensions

Recommended Ballasts for HR175A39

The following GE ballast models are recommended for use with the HR175A39 175W mercury vapor lamp:

Always verify ballast ANSI code (H39) and input voltage match your installation circuit before ordering a replacement ballast.

Applications

The GE HR175A39 175W mercury vapor lamp is suited for commercial and industrial area lighting in existing mercury vapor fixture installations:

• Outdoor area and parking lot lighting – Replacement lamp for pole-mounted 175W mercury vapor area fixtures with enclosed fixture housings in commercial parking lots, campuses, and outdoor common areas.
• Security and perimeter lighting – Commercial, institutional, and industrial security fixtures requiring long-life continuous-burn operation with minimal maintenance access.
• Industrial high-bay and low-bay facilities – 175W mercury vapor high-bay and low-bay fixtures in warehouses and industrial environments running H39 ballasts.
• Commercial outdoor HID installations – General commercial area lighting on existing 175W mercury vapor ballast infrastructure where direct lamp replacement is the maintenance strategy.
• Institutional and municipal outdoor lighting – Government and institutional fixtures on existing mercury vapor infrastructure where lamp replacement extends fixture service life without capital expenditure.

Replacing Your Current 175W Mercury Vapor Lamp?

Confirm the following before ordering to ensure a compatible replacement:

• ANSI code — H39/O: The H39/O ANSI code is the critical ballast compatibility specification. Verify your existing ballast is rated for H39 operation. H39 (175W) and H38 (100W) are different ANSI designations — they are not interchangeable on the same ballast even though both use E39 mogul bases.
• Wattage: 175W mercury vapor. Do not install in fixtures rated for 100W, 250W, or 400W mercury vapor, or for metal halide or high-pressure sodium technology.
• Base type: E39 mogul screw. Verify your fixture socket accepts E39 mogul base lamps.
• Enclosed fixture requirement: This lamp must be installed in an enclosed fixture. Do not use in open fixtures or where directly exposed to water or moisture.
• Burn position: Universal — no orientation restriction.
• Ballast selection: If replacing the ballast alongside the lamp, refer to the recommended ballast table above. Verify input voltage and ANSI code match before ordering.
• Warm-up and re-strike: Mercury vapor lamps require several minutes to warm up to full output after ignition. After being extinguished while hot, a cool-down period is required before re-striking — this is normal behavior for mercury vapor HID technology.

Safety Information

Warning: Risk of electric shock, fire, and UV radiation exposure. Read all safety information before installation.

• Turn power off before inspection, installation, or removal. Allow the lamp to cool before handling.
• Do not use where directly exposed to water or outdoors without an enclosed fixture. This lamp requires an enclosed fixture rated for this product.
• Keep combustible materials away from the lamp and fixture — maintain required clearance per fixture manufacturer specifications.
• Use only in a fixture rated and listed for this product. Do not exceed rated voltage.
• A damaged lamp emits UV radiation which may cause eye and skin injury. Turn power off immediately if the outer glass bulb is cracked, scratched, or broken. Remove and dispose of the damaged lamp properly.
• Do not use lamp if outer glass is scratched or broken under any circumstances — UV exposure risk.
• Unexpected lamp rupture may cause injury, fire, or property damage — follow all handling and installation precautions.
• Mercury vapor lamps contain mercury — dispose of in accordance with local and state lamp recycling regulations. Do not dispose of in general waste. Visit lamprecycle.org for recycling resources.

Ordering Information

• Brand: GE Lighting
• Lamp Code: HR175A39
• Lamp Type: Mercury Vapor HID, 175W Deluxe White
• ANSI Code: H39/O
• Base: E39 Mogul Screw
• Case quantities and bulk pricing: Contact ADL Supply for volume orders.

Compliance and Certifications

• Verify ANSI C78 series compliance with manufacturer specification sheet.
• Verify UL listing status with manufacturer specification sheet.
• Verify RoHS compliance status with manufacturer specification sheet.
• Verify California Title 20 / T24 compliance with manufacturer specification sheet.
• Verify Prop 65 warning requirements with manufacturer specification sheet.
• Mercury disposal: This lamp contains mercury. Dispose of per local and state lamp recycling regulations. Do not dispose of in general waste. For lamp recycling information, visit lamprecycle.org.

ADL Supply recommends confirming all applicable compliance data with the GE Lighting official product data sheet prior to specification or installation.