Sylvania 69444 H39KB-175

The Sylvania 175-Watt Clear Mercury Vapor ED28 Lamp (ANSI H39) is a heavy-duty high-intensity discharge (HID) bulb engineered for traditional industrial high-bays, security area floodlights, and commercial parking structure systems. Delivering a powerful 7,700 initial lumens of a crisp 5900K daylight-white light spectrum, this robust lamp features a standard E39 mogul screw base and a heavy-duty outer glass envelope. Built for prolonged maintenance durability, it offers a reliable 24,000-hour rated average lifespan across an adaptable universal burning orientation.

ADL Supply Expert Application & Replacement Guide

The Sylvania H39 175W clear mercury vapor lamp is an industrial maintenance staple for property owners servicing traditional high-bay industrial arenas, agricultural yard fixtures, and security perimeter wall packs. Operating at high system parameters, it yields incredibly resilient lumen maintenance profiles, maintaining a high 7,150 mean lumens mid-way through its long operational life. Because it has universal burning parameters, contractors can install this module horizontally or vertically without altering current limits.

Safety Shielding Note for Operations: This clear HID lamp uses an intensive inner quartz arc mechanism. To satisfy general liability and code restrictions in public or indoor facility setups, installation inside fully enclosed luminaires equipped with heat-resistant glass lenses is highly recommended. If the outer clear bulb shell should ever crack, break, or puncture due to localized contact or voltage transients, immediately disconnect line power to the fixture. Operating a mercury vapor lamp with a broken outer jacket allows dangerous short-wave ultraviolet (UV) radiation to escape, which can cause severe skin burns and acute eye irritation.

Detailed Product Specifications

• Brand: Sylvania
• Product Core Category: High-Intensity Discharge (HID)
• Technology Framework: Mercury Vapor Clear
• Industry ANSI Ballast Code: H39 (Requires matching H39 control ballast)
• Operational Wattage: 175 Watts
• Initial Luminous Flux: 7,700 Lumens
• Mean Luminous Flux: 7,150 Lumens (Measured at 50% rated life)
• Color Temperature Configuration: 5900K (Daylight White Spectrum)
• Color Rendering Index (CRI): ~22
• Bulb Shape Profile: Clear ED28 (Ellipsoidal Dimpled)
• Base Configuration: E39 Mogul Screw Base
• Maximum Overall Length (MOL): 8.31" Inches (211mm)
• Bulb Nominal Diameter: 3.5" Inches (89mm)
• Rated Average Lifespan: 24,000 Hours
• Burning Position Parameters: Universal (All-Angle Deployment)

Operation, Safety & Mounting Compliance

Warm-Up, Restrike, and System Ignition Phases

Unlike instantaneous linear tubes, legacy mercury vapor HID lamps require a progressive vaporization phase down the arc path. Expect a maximum warm-up window of up to 15 minutes to establish complete luminous density and full color rendering. In the event of an unexpected circuit interrupt or localized sag, a hot restrike safety window of 3 to 9 minutes must occur to allow internal pressures to balance before the system ignitor can restrike the arc.

Thermal Thresholds & Operational Boundaries

This industrial component operates under intensive thermal loads. Structural thresholds require that the E39 mogul ceramic base temperature must never exceed 374°F (190°C), while the outer glass face envelope is restricted to a peak limit of 752°F (400°C). Verify that ballast current traits are structurally matched; do not attempt to run an H39 bulb on Metal Halide (M57) or High Pressure Sodium (S55) ballast systems, as immediate hardware damage will occur.

Mercury Stewardship Regulations

This lamp contains active mercury elements to secure its high lumen density over long duty cycles. Disposal must comply with local and state environmental boundaries. Do not crush spent lamps inside indoor refuse containers; contract with local commercial lamp collection providers during extensive facility renovations.

Bulk Commercial Lighting Supply & Project Support

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For professional contractor tiered discounts, full pallet freight distributions, or dedicated technical submittal specification sheets, reach our support center directly at 1-800-235-3489. We are your commercial supply partners as a dedicated wholesale Lighting Distributor In Doral, Florida.