Sylvania 20849 GFT24DL/2G11/SE/OF

Osram Sylvania 20849 GFT24DL/2G11/SE/OF – 24W Germicidal UV-C Lamp | 254 nm | 87V | 2G11 4-Pin | Ozone-Free    

The OSRAM 20849 GFT24DL/2G11/SE/OF is a 24W soft-glass germicidal UV-C lamp designed for compatible air-purification, water-purification, and surface-disinfection equipment. It emits high-intensity UV-C radiation at approximately 254 nm and features an ozone-free design for applications where ozone generation is not desired. This 87V, 0.34A lamp uses a 2G11 4-pin base, requires a corresponding 24W preheat ballast and starter, and has an average rated life of 8,000 hours. This is a Risk Group 3 ultraviolet source and must only be operated in properly shielded germicidal equipment. Please verify lamp designation, ballast, starter, base, dimensions, and equipment safety controls before ordering.

Technical Specifications

Key Features & Benefits

• Produces high UV-C radiance at approximately 254 nm for compatible disinfection equipment.
• Supports chemical-free air, water, and surface treatment processes.
• Ozone-free design for applications where ozone generation is not desired.
• Low-mercury construction compared with conventional germicidal lamp designs.
• Special lamp coating supports long service life and consistent UV-C performance.
• Universal operating position provides installation flexibility in properly designed equipment.

Product Overview

The OSRAM 20849 is a compact, twin-tube germicidal UV-C lamp designed for specialized purification and disinfection systems. Its soft-glass construction emits germicidal ultraviolet radiation at approximately 254 nm, a wavelength used by appropriately engineered equipment for treating air, water, and exposed surfaces.

The ozone-free configuration is intended for systems where ozone production is undesirable. This distinction is important because germicidal lamps with different glass compositions may generate ozone and should not be substituted solely on the basis of wattage, dimensions, or base type.

This lamp requires a corresponding 24W preheat ballast and a starter. Although it can physically operate in certain standard fluorescent-style fixtures, it must never be used for general illumination because direct or reflected UV-C exposure can cause serious eye and skin injury.

Compatible Applications

• Air-purification equipment specifically designed for 24W 2G11 germicidal lamps
• Water-purification systems with enclosed UV-C treatment chambers
• Surface-disinfection equipment with engineered shielding and safety interlocks
• HVAC and air-handling disinfection assemblies designed for this exact lamp type
• Specialty germicidal equipment requiring an ozone-free 254 nm UV-C source

Before Ordering – Verify

• Product number: Confirm OSRAM product number 20849 and ordering abbreviation GFT24DL/2G11/SE/OF.
• Application: Confirm the equipment manufacturer specifies this exact germicidal lamp or an approved equivalent.
• Ozone-free requirement: The OF designation identifies an ozone-free lamp. Do not substitute ozone-generating and ozone-free versions without equipment-manufacturer approval.
• Base: Confirm the equipment uses a 2G11 4-pin socket.
• Electrical system: Verify compatibility with a 24W, 87V, 0.34A germicidal lamp.
• Ballast and starter: A corresponding-wattage preheat ballast and starter are required.
• Dimensions: Confirm a 315 mm overall length, 40 mm diameter, and 285 mm reference distance.
• Safety enclosure: Verify that the equipment provides adequate UV shielding, access controls, and safety interlocks.
• Not for general lighting: Do not install this lamp in occupied-space lighting fixtures.

Safety and Handling Guidelines

• Risk Group 3 ultraviolet source: Direct or reflected UV-C exposure can cause serious eye and skin injury.
• Do not look at an operating lamp and do not expose skin to its radiation.
• Operate only inside equipment that provides adequate shielding, interlocks, and access controls.
• Protective barriers may include opaque materials and ordinary window glass where appropriate to the equipment design.
• Disconnect electrical power before inspecting, installing, cleaning, or removing the lamp.
• Use protective clothing, gloves, and suitable eye protection when servicing UV-C equipment.
• Do not use this lamp for general illumination, even if it can operate in a fluorescent-style fixture.
• Handle the glass carefully and do not install a cracked, damaged, or contaminated lamp.
• Follow the purification-equipment manufacturer’s installation, operation, and replacement instructions.

Compliance & Environmental Information

• Risk Group 3 ultraviolet lamp per ANSI/IESNARP-27.3-96.
• Ozone-free germicidal lamp design.
• Contains mercury and must be recycled or disposed of according to applicable local, state, and federal regulations.
• No UL, ETL, DLC, Title 20, Title 24, or JA8 certification was identified in the provided manufacturer datasheet.

Ordering Information

• Brand: OSRAM
• Product Number: 20849
• Ordering Abbreviation: GFT24DL/2G11/SE/OF
• EAN / UPC: 4008321516176
• Wattage: 24W
• Voltage: 87V
• Base: 2G11 4-pin
• UV-C Output: Approximately 254 nm
• Sales Unit: 1 lamp
• Case Quantity: 10 lamps
• Case GTIN: 10046135208499

For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.