Philips 414359 F39T5/850/HO/ALTO

Philips 414359 F39T5/850/HO/ALTO – 39W T5 High Output Fluorescent | 5000K Daylight | 85 CRI | G5 Mini Bi-Pin | 34 in

The Philips 414359 F39T5/850/HO/ALTO is a 39W T5 high-output fluorescent lamp designed for commercial, industrial, architectural, and maintenance replacement applications requiring strong light output from a slim 5/8-inch T5 lamp. This lamp provides 5000K daylight color with 85 CRI and uses a G5 miniature bi-pin base. It requires a compatible T5 HO ballast and is not interchangeable with T8 or T12 fluorescent lamps. Please verify wattage, length, ballast compatibility, base type, and color temperature before ordering.

Technical Specifications

Key Features & Benefits

• 39W T5 HO fluorescent lamp for high-output commercial lighting systems.
• 5000K daylight color for bright, clean task and general illumination.
• G5 miniature bi-pin base for compatible T5 HO fixtures.
• Slim 5/8-inch T5 diameter for compact fixture designs.
• Philips ALTO fluorescent lamp technology for reduced mercury compared with standard fluorescent lamps.

Product Overview

The Philips 414359 F39T5/850/HO/ALTO is built for facilities that require a 39W T5 high-output lamp with daylight color and a compact lamp profile. Its 34-inch maximum overall length and G5 miniature bi-pin base make it suitable for fixtures specifically designed around F39T5 HO lamps.

The 5000K daylight color temperature is commonly used where a crisp, bright appearance is preferred, including commercial interiors, industrial task areas, architectural fixtures, and maintenance replacement applications.

This lamp must be used with a compatible T5 HO ballast. Matching the correct wattage, ballast type, lamp length, and color temperature is critical to avoid fixture compatibility problems.

Compatible Applications

• Commercial T5 HO fixtures
• Industrial task lighting
• Architectural linear fixtures
• Retail and display lighting requiring daylight color
• Facility maintenance replacement for existing F39T5/850 lamps

Before Ordering – Verify

• Wattage: Confirm your fixture and ballast are rated for 39W T5 HO lamps.
• Base: Confirm the socket is G5 miniature bi-pin. This lamp does not fit T8 or T12 sockets.
• Length: Confirm the existing lamp is 34.0 inches maximum overall length.
• Color temperature: This lamp is 5000K daylight. Confirm it matches the lamps currently installed.
• Ballast: Verify the ballast supports T5 HO fluorescent operation.
• Family check: T5 lamps are not interchangeable with T8, T12, or LED ballast-bypass lamps unless the fixture has been properly converted.

Safety and Handling Guidelines

• Disconnect power before installing or replacing the lamp.
• Use only in fixtures and ballasts rated for F39T5 HO fluorescent lamps.
• Handle by the lamp ends when possible and avoid unnecessary pressure on the glass tube.
• Do not force the lamp into the socket; verify G5 miniature bi-pin compatibility.
• This fluorescent lamp contains mercury and should be recycled according to federal, state, and local requirements.
• If broken, ventilate the area and follow fluorescent lamp cleanup guidance.

Compliance & Environmental Information

• Philips ALTO fluorescent lamp technology.
• Contains mercury; recycle through an approved lamp recycling program where required.
• No UL, ETL, DLC, Title 20, Title 24, or JA8 certifications were confirmed in the provided source content.

Ordering Information

• Brand: Philips
• Product Number: 414359
• SKU: PHLB414359
• Order Code: 41435-9
• Ordering Abbreviation: F39T5/850/HO/ALTO
• UPC: 046677414351
• Wattage: 39W
• Color Temperature: 5000K Daylight
• Base: G5 Miniature Bi-Pin

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