Philips 369843

Philips F48T12/D/HO/ALTO Fluorescent Tube Light Bulb User Manual

Model: 369843

1. Introduction

This manual provides essential information for the safe and effective installation, operation, and maintenance of your Philips F48T12/D/HO/ALTO Fluorescent Tube Light Bulb (Model 369843). Please read these instructions carefully before use and retain them for future reference.

The Philips F48T12/D/HO/ALTO is a 60-watt, 48-inch T12 fluorescent tube designed for high output applications. It features a Recessed Double Contact (R17d) base and emits a 6,500K Daylight white light, providing 3400 lumens of brightness. This bulb is engineered for energy efficiency and has an average lifetime of 12,000 hours.

2. Safety Information

WARNING: Risk of electric shock. Always turn off power at the circuit breaker or fuse box before installation, removal, or maintenance.

  • Ensure the fixture is compatible with T12 fluorescent bulbs and the R17d base type.
  • Do not use this bulb with dimmers unless specifically rated for fluorescent dimming systems.
  • Handle the bulb carefully. Do not drop or subject it to excessive force.
  • If the bulb breaks, ventilate the area and carefully clean up glass fragments and mercury-containing materials according to local regulations. Avoid direct contact with skin.
  • Do not operate the bulb in wet locations or where it may be exposed to water.
  • Keep out of reach of children.

3. Setup and Installation

  1. Turn off Power: Before attempting any installation, ensure the power supply to the fixture is completely turned off at the main circuit breaker or fuse box.
  2. Remove Old Bulb (if applicable): If replacing an existing bulb, carefully rotate and pull the old fluorescent tube from its sockets. Dispose of the old bulb properly according to local regulations.
  3. Inspect Fixture: Check the fixture's sockets for any damage or corrosion. Ensure they are clean and in good working order.
  4. Install New Bulb: Align the Recessed Double Contact (R17d) pins on each end of the Philips F48T12/D/HO/ALTO bulb with the slots in the fixture's sockets. Gently push the bulb into the sockets and rotate it until it is securely seated. Do not force the bulb.
  5. Restore Power: Once the bulb is securely installed, restore power to the fixture at the circuit breaker or fuse box.
  6. Test: Turn on the light switch to verify proper operation.
Philips F48T12/D/HO/ALTO Fluorescent Tube Light Bulb
Image 1: Philips F48T12/D/HO/ALTO straight T12 fluorescent tube light bulb. This image illustrates the linear form of the bulb, which is 48 inches in length and features a T12 diameter, designed for high output lighting applications.

4. Operating Instructions

The Philips F48T12/D/HO/ALTO fluorescent tube operates like any standard fluorescent light bulb. Once properly installed and power is restored to the fixture, simply use the wall switch or fixture control to turn the light on and off.

  • Initial Start-up: Some fluorescent bulbs may flicker briefly or take a moment to reach full brightness upon initial start-up, especially in colder environments. This is normal.
  • Light Output: The bulb provides 3400 lumens of 6,500K Daylight white light, suitable for areas requiring bright, cool-toned illumination.

5. Maintenance

Minimal maintenance is required for your Philips fluorescent tube. Regular cleaning and proper disposal are key to ensuring longevity and safety.

  • Cleaning: Ensure the power is off before cleaning. Wipe the bulb gently with a soft, dry, or slightly damp cloth. Do not use abrasive cleaners or solvents.
  • Replacement: The average lifetime of this bulb is 12,000 hours. When the bulb reaches the end of its life, it may flicker, dim, or fail to light. Replace it following the installation instructions in Section 3.
  • Disposal: Fluorescent bulbs contain small amounts of mercury and should not be disposed of in regular household trash. Check with your local waste management authority for proper recycling or disposal options in your area. Many retailers also offer recycling programs for fluorescent bulbs.

6. Troubleshooting

If your Philips F48T12/D/HO/ALTO fluorescent tube is not functioning as expected, consider the following common issues and solutions:

Problem Possible Cause Solution
Bulb does not light up. No power to the fixture.
Bulb not properly seated.
Defective bulb or ballast.
Check circuit breaker/fuse.
Ensure bulb is securely installed (see Section 3).
Replace bulb. If problem persists, consult an electrician for ballast inspection.
Bulb flickers or hums. Old or failing ballast.
Loose connection.
Cold environment.
Consult an electrician to inspect/replace ballast.
Ensure bulb is securely seated.
Allow time for bulb to warm up.
Reduced light output. Bulb nearing end of life.
Dirty bulb.
Replace bulb.
Clean bulb (see Section 5).

7. Specifications

Brand Philips
Model Number 369843
Light Type Fluorescent
Bulb Shape Size T12 (48 inches)
Base Type Recessed Double Contact (R17d)
Wattage 60 Watts
Incandescent Equivalent Wattage 200 Watts
Light Color Daylight White
Color Temperature 6500 Kelvin
Brightness 3400 Lumens
Color Rendering Index (CRI) 79
Average Lifetime 12,000 hours
Special Feature Energy Efficient
Material Type Copper
UPC 046677369842

8. Warranty and Support

Philips products are manufactured to high-quality standards. Specific warranty details for your Philips F48T12/D/HO/ALTO Fluorescent Tube Light Bulb are typically provided with the product packaging or can be found on the official Philips lighting website.

For technical support, warranty claims, or further assistance, please contact Philips customer service. You can usually find contact information on the product packaging or by visiting the official Philips website:

Visit Philips Lighting Official Website

© 2026 Philips. All rights reserved. Information subject to change without notice.

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