Product Overview
The Sylvania F24T12/CW/HO is a 35W High Output (HO) 2-foot T12 linear fluorescent lamp engineered for commercial signage, industrial high-bay fixtures, refrigeration case lighting, and warehouse applications requiring higher-intensity output from a 24-inch tube format. Delivering 1,650 initial lumens of 4200K cool white light through a Rapid Start design, this lamp utilizes an R17d Recessed Double Contact base — incompatible with standard T12 G13 bi-pin sockets — and requires a dedicated High Output T12 ballast for correct operation.
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Wattage
35W
T12 HO Linear
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Initial Lumens
1,650 lm
1,335 lm Mean
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Color Temp
4200K
Cool White | CRI 60
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Base Type
R17d
Recessed Double Contact
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Rated Life
9,000 Hr
Rapid Start
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ADL Supply Expert Application & Replacement Guide
The Sylvania F24T12/CW/HO is primarily specified by electrical contractors and facility maintenance teams servicing outdoor signage cabinets, industrial high-bay fixtures, commercial refrigeration case lighting, and warehouse shop fixtures where the compact 24-inch format and High Output wattage are both required. The R17d Recessed Double Contact base is a keyed base format used exclusively on High Output T12 lamps — the recessed pin configuration is physically distinct from the standard G13 medium bi-pin base used on standard T12 and T8 lamps, preventing mis-lamping into standard T12 fixtures. This lamp requires a dedicated High Output T12 Rapid Start ballast specifically rated for 35W 24-inch HO operation — standard 40W T12 magnetic ballasts, T8 electronic ballasts, and ballasts not rated for HO lamps will not correctly drive this lamp's higher operating current and will result in non-ignition or premature failure. Confirm the existing fixture ballast carries an HO rating and that the lampholder is R17d before ordering.
Before You Order
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Verify Before Ordering
R17d Socket Required — HO T12 Ballast Only | Not Compatible with Standard T12 or T8 Fixtures
This lamp uses an R17d Recessed Double Contact base — it is not compatible with standard G13 medium bi-pin T12 or T8 sockets. Confirm your fixture has R17d lampholders and a High Output T12 Rapid Start ballast specifically rated for this lamp before ordering. Do not attempt to operate this lamp on a standard T12 magnetic ballast, T8 electronic ballast, or any ballast not rated for High Output T12 operation.
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Detailed Product Specifications
- Brand: Sylvania (Ledvance)
- Product Line Series: High Output T12 Linear Fluorescent
- Manufacturer Part Number: F24T12/CW/HO
- Order Code: Confirm with Sylvania specification sheet
- Core Technology: T12 High Output Linear Fluorescent — Rapid Start
- Ballast Requirement: High Output T12 Rapid Start ballast — rated for 35W 24-inch HO operation
- Wattage: 35W
- Initial Lumens: 1,650 lm
- Mean Lumens: 1,335 lm
- Color Temperature (CCT): 4200K Cool White
- Color Rendering Index (CRI): 60
- Base Type Configuration: R17d Recessed Double Contact
- Tube Diameter: T12 — 1.5 inches (38mm)
- Nominal Length: 24 inches (2 feet)
- Start Method: Rapid Start
- Rated Average Lifespan: 9,000 Hours
- Burn Position: Universal — Any Orientation
- Mercury Content: Contains mercury — recycle per applicable regulations
Operation, Safety & Mounting Compliance
HO Ballast Requirement & R17d Socket Specificity
High Output T12 lamps operate at higher lamp current than standard-output T12 lamps — the ballast must be specifically rated for High Output operation to deliver the correct lamp current for stable arc maintenance and rated lumen output. Standard T12 magnetic ballasts designed for 40W standard-output lamps will under-drive this lamp, resulting in reduced light output and shortened lamp life. The R17d Recessed Double Contact base uses a larger pin diameter and recessed mounting profile that physically prevents installation into standard G13 bi-pin T12 sockets — this is an intentional safety feature preventing standard-output ballasts from being connected to High Output lamps. Confirm R17d lampholders are present in the fixture before installation.
Mercury Content & Disposal
This lamp contains mercury and must be recycled through a certified lamp recycling program in compliance with applicable federal, state, and local environmental regulations. Do not discard in standard municipal solid waste. State shipping restrictions may apply in CA, CO, HI, ME, MN, OR, RI, and VT — confirm shipping eligibility before ordering.
Industry Cross-Reference Data
- GE Lighting: F24T12/CW/HO (equivalent 35W 24-inch T12 HO cool white R17d)
- Philips: F24T12/CW/HO (equivalent High Output T12 R17d cool white)
- Osram: L35W/21 (equivalent 35W T12 HO linear cool white R17d platform)
- Legacy Cross-Reference: Direct replacement for 35W 24-inch T12 High Output R17d Rapid Start lamp positions in signage, refrigeration case, industrial, and shop lighting fixture installations
Bulk Commercial Lighting Supply & Project Support
ADL Supply delivers commercial-volume logistical fulfillment, tiered commercial contractor discounting strategies, and full pallet project quoting options to electrical accounts across the United States.
For formal wholesale inquiries, volume pricing modifications, or manufacturer spec sheet documentation, reach our commercial branch directly at 1-800-235-3489. We are your commercial supply partners as an authorized wholesale Lighting Distributor In Doral, Florida.
