Sylvania 22251 F20T12/D35

Sylvania 22251 F20T12/D35 – 20W T12 Preheat Fluorescent Lamp | 3500K | 1,300 Lumens | G13 Medium Bi-Pin

1,300 lumens at 3500K Designer with CRI 70 – a 20W T12 Preheat fluorescent lamp designed for preheat (starter-operated) fixtures.

Quick Specs

• Brand: Sylvania
• Product Code / Model: 22251 / F20T12/D35
• Lamp Type: Fluorescent – T12 Preheat
• Starting Method: Preheat (starter required)
• Wattage: 20W
• Base Type: G13 Medium Bi-Pin
• Color Temperature: 3500K Designer
• CRI: 70
• Initial Lumens: 1,300 lm (approx., after 100 hours of operation)
• Mean Lumens: 1,170 lm (measured at 40% of rated life)
• Rated Average Life: 9,000 hr at 3 hours per start
• Nominal Length: 24 in
• Maximum Overall Length (MOL): 23.78 in
• Bulb Diameter: 1.5 in (T12)

Product Overview

The Sylvania 22251 F20T12/D35 is a 20W T12 Preheat fluorescent lamp delivering 1,300 initial lumens at 3500K Designer. It is built for preheat (starter-operated) fixtures where lamp length, base type, ballast type, wattage, and color temperature must match the existing system.

This lamp is best suited for maintenance replacement in commercial, industrial, and institutional spaces. Before ordering, confirm the G13 Medium Bi-Pin base, 20W wattage, and 3500K color temperature against your existing lamp or fixture label.

Why Choose This Product

• 1,300 initial lumens: Catalog rating after 100 hours of operation, with 1,170 mean lumens at 40% of rated life.
• 3500K Designer: Helps match the existing light color across a facility.
• G13 Medium Bi-Pin base: Designed for the correct T12 socket style; confirm before replacement.
• 9,000 hr rated average life: Rated at 3 hours per start; longer burn cycles increase lamp life.
• Sylvania quality: Suitable for professional lighting applications and facility maintenance.

Technical Specifications

Dimensions

Applications

• Maintenance and retrofit replacement in compatible preheat (starter-operated) fixtures
• Commercial, industrial, and institutional facilities and utility spaces
• Replacement for existing F20T12/D35 lamps – confirm the lamp code on your current lamp

Compatibility & Replacement

Fixture type: Designed for preheat (starter-operated) fixtures using a G13 Medium Bi-Pin base.

Ballast / starter: This is a preheat lamp and requires a starter (the catalog lists it under “Starter Required”). Always confirm the existing ballast and starter before ordering.

Starting temperature: Minimum starting temperature is a function of the ballast; consult the ballast manufacturer.

Before ordering, confirm:

• Existing lamp model matches F20T12/D35 or an approved equivalent.
• Fixture socket matches G13 Medium Bi-Pin.
• Wattage is 20W and the ballast is compatible.
• Color temperature is 3500K Designer.
• Physical size is 24 in nominal length (23.78 in MOL) x 1.5 in diameter.

Ballast cross-references carried over from the previous listing (not found in the Sylvania catalog – verify against your fixture label before ordering):

• Advance LC1420C-I
• GE240RS-MV-N
• Halco #50108 E120RS/120
• Robertson RSW120T12120

Ordering Information

• Brand: Sylvania
• Product Code / Model: 22251 / F20T12/D35
• Description: 20W T12 Preheat fluorescent lamp, 3500K Designer, 1,300 lumens, G13 Medium Bi-Pin base
• Specifications: Taken from the Sylvania linear fluorescent lamp catalog; specifications are subject to change without notice.

Safety & Handling Notes

• Disconnect power before installing or servicing.
• Use only in approved fixtures designed for compatible F20T12/D35 lamps.
• Fluorescent lamps contain mercury and should be recycled or disposed of according to local regulations.
• Follow the fixture manufacturer's instructions and local electrical codes for installation.

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