Sylvania 21542 F15T12/WW

Sylvania 21542 F15T12/WW – 15W T12 Preheat Fluorescent Lamp | 3000K | 770 Lumens | G13 Medium Bi-Pin

770 lumens at 3000K Warm White with CRI 52 – a 15W T12 Preheat fluorescent lamp designed for preheat (starter-operated) fixtures.

Quick Specs

• Brand: Sylvania
• Product Code / Model: 21542 / F15T12/WW
• Lamp Type: Fluorescent – T12 Preheat
• Starting Method: Preheat (starter required)
• Wattage: 15W
• Base Type: G13 Medium Bi-Pin
• Color Temperature: 3000K Warm White
• CRI: 52
• Initial Lumens: 770 lm (approx., after 100 hours of operation)
• Mean Lumens: 670 lm (measured at 40% of rated life)
• Rated Average Life: 9,000 hr at 3 hours per start
• Nominal Length: 18 in
• Maximum Overall Length (MOL): 17.78 in
• Bulb Diameter: 1.5 in (T12)

Product Overview

The Sylvania 21542 F15T12/WW is a 15W T12 Preheat fluorescent lamp delivering 770 initial lumens at 3000K Warm White. 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, 15W wattage, and 3000K color temperature against your existing lamp or fixture label.

Why Choose This Product

• 770 initial lumens: Catalog rating after 100 hours of operation, with 670 mean lumens at 40% of rated life.
• 3000K Warm White: 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 F15T12/WW 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 F15T12/WW or an approved equivalent.
• Fixture socket matches G13 Medium Bi-Pin.
• Wattage is 15W and the ballast is compatible.
• Color temperature is 3000K Warm White.
• Physical size is 18 in nominal length (17.78 in MOL) x 1.5 in diameter.

Ordering Information

• Brand: Sylvania
• Product Code / Model: 21542 / F15T12/WW
• Description: 15W T12 Preheat fluorescent lamp, 3000K Warm White, 770 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 F15T12/WW 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.