LEDVANCE 21657

SYLVANIA T8 Gro-Lux Fluorescent Tube Instruction Manual

Model: 21657

Introduction

This manual provides essential information for the proper installation, operation, and maintenance of your SYLVANIA T8 Gro-Lux Fluorescent Tube. SYLVANIA's GRO-LUX Aquarium fluorescent lamps are designed to provide the essential energy for use in indoor gardening applications. They deliver the right balance of red and blue wavelengths, which are most beneficial for chlorophyll synthesis, plant growth, and flowering processes. Photosynthetically Active Radiation (PAR) varies according to the specific plant cultivar being grown.

Safety Information

Please read and understand all safety instructions before installing or operating the fluorescent tube. Failure to do so may result in electric shock, fire, or other injuries.

  • Always disconnect power to the fixture before installing, removing, or cleaning the lamp.
  • Ensure the lamp is cool before handling.
  • Do not use in wet locations unless the fixture is specifically rated for such use.
  • Handle glass components with care to prevent breakage.
  • Dispose of fluorescent lamps according to local regulations, as they may contain small amounts of mercury.
  • This lamp is non-dimmable. Do not use with dimmer switches.

Setup and Installation

The SYLVANIA T8 Gro-Lux Fluorescent Tube is designed for easy installation into compatible T8 fluorescent fixtures with a G12 Bi-Pin base.

  1. Power Disconnection: Before beginning, ensure the power supply to the light fixture is completely turned off at the circuit breaker or wall switch.
  2. Remove Old Bulb (if applicable): If replacing an existing bulb, carefully twist the old fluorescent tube 90 degrees to align the pins with the slots in the lamp holders, then gently pull it out.
  3. Insert New Bulb: Align the two pins on each end of the SYLVANIA T8 Gro-Lux tube with the slots in the lamp holders of your fixture. Gently push the tube into the lamp holders until the pins are fully seated.
  4. Secure Bulb: Once the pins are seated, rotate the tube 90 degrees until it locks securely into place. The tube should feel firm and not wobble.
  5. Restore Power: Turn the power back on to the fixture. The lamp should illuminate immediately.
SYLVANIA T8 Gro-Lux Fluorescent Tube out of packaging

Figure 1: SYLVANIA T8 Gro-Lux Fluorescent Tube, ready for installation.

Close-up of the G12 Bi-Pin base on the fluorescent tube

Figure 2: Detail of the G12 Bi-Pin base for proper fixture alignment.

Operating Instructions

The SYLVANIA T8 Gro-Lux Fluorescent Tube is specifically designed to support indoor gardening by providing the optimal light spectrum for plant photosynthesis and growth.

  • Light Spectrum: This lamp emits a balanced spectrum of red and blue wavelengths, which are crucial for chlorophyll synthesis and enhancing vegetation.
  • Photosynthetically Active Radiation (PAR): The light output is optimized for PAR, providing the necessary energy for all stages of indoor gardening, including germination, propagation, and mature plant growth.
  • Usage: Simply turn on your compatible fluorescent fixture to activate the Gro-Lux lamp. The duration of light exposure should be adjusted based on the specific needs of your plants.
Gardener inspecting healthy plants under grow lights

Figure 3: The Gro-Lux tube provides essential light for plant development.

Tomato plants thriving under artificial light in a greenhouse setting

Figure 4: Ideal for promoting growth and maintaining vegetation in various indoor setups.

Maintenance

The SYLVANIA T8 Gro-Lux Fluorescent Tube requires minimal maintenance to ensure optimal performance and longevity.

  • Cleaning: Periodically, with the power off and the lamp cool, gently wipe the tube with a soft, dry cloth to remove any dust or debris that may accumulate and reduce light output. Do not use liquid cleaners directly on the bulb.
  • Lamp Life: This fluorescent tube has an average rated life of 7,500 hours. Actual lifespan may vary depending on usage conditions, such as frequency of switching and ambient temperature.
  • Replacement: Replace the lamp when it begins to flicker excessively, fails to light, or when its light output significantly diminishes.

Troubleshooting

If you experience issues with your SYLVANIA T8 Gro-Lux Fluorescent Tube, refer to the following common troubleshooting steps:

ProblemPossible CauseSolution
Lamp does not light up.No power to the fixture, incorrect installation, faulty lamp, or faulty ballast/fixture.
  • Check power supply and circuit breaker.
  • Ensure lamp is correctly seated and twisted into lamp holders.
  • Try the lamp in a known working fixture, or try a known working lamp in the current fixture to isolate the issue.
  • If the ballast is suspected, consult a qualified electrician.
Lamp flickers or cycles on and off.Aging lamp, incorrect lamp type for fixture, or faulty ballast.
  • Replace the lamp with a new one.
  • Verify the fixture is compatible with T8 fluorescent tubes.
  • If flickering persists with a new lamp, the ballast may need replacement by a qualified electrician.
Reduced light output.Dust accumulation, end of lamp life, or incorrect lamp for application.
  • Clean the lamp surface with a dry cloth.
  • Consider replacing the lamp if it has reached or exceeded its rated lifespan.
  • Ensure the lamp is suitable for your specific plant growth requirements.

Specifications

Key technical specifications for the SYLVANIA T8 Gro-Lux Fluorescent Tube:

SpecificationValue
Model Number21657
Light TypeFluorescent
Bulb Shape SizeT8
Wattage15 Watts
Bulb BaseG12 Bi-Pin
Brightness325 Lumens
Color Temperature5500 Kelvin
Voltage120 Volts
Average Life7500 Hours
Length18 inches
Product Dimensions (Approx.)1.16"W x 3"H (packaging)
MaterialGlass
Indoor/Outdoor UsageIndoor
A greenhouse filled with various plants under grow lights, illustrating the application of the fluorescent tube.

Figure 5: The SYLVANIA Gro-Lux tube is designed for optimal performance in indoor plant cultivation environments.

Warranty Information

This SYLVANIA T8 Gro-Lux Fluorescent Tube comes with a 2-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. For full warranty terms and conditions, please refer to the official SYLVANIA website or contact customer support.

Customer Support

For technical assistance, product inquiries, or warranty claims, please contact SYLVANIA customer support through their official website or the contact information provided on the product packaging. When contacting support, please have your product model number (21657) and purchase date available.

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