Sylvania 21532 F15T12/CW

SYLVANIA 21532 | F15T12/CW 15W 4200K Cool White 18" Preheat Start T12 Linear Fluorescent Tube

The Sylvania 21532 (F15T12/CW) is a commercial-grade, high-reliability **15W linear fluorescent tube** engineered for compact low-profile fixtures, task illumination fields, retail display cabinetry, and marine or recreational vehicle specialty frameworks. Featuring a traditional **G13 medium bi-pin base** and a heavy-duty **1.5-inch diameter T12 glass profile**, this 18-inch lamp operates via a specialized **Preheat Start ignition protocol** when paired with an external starter and compatible magnetic induction core or electronic ballast. Utilizing classic halo-phosphor gas-discharge mechanics, it radiates **750 initial lumens** of crisp, sharp **4200K Cool White** light to maximize focal visibility. Built to strict manufacturing baselines, this dependable tube offers an economical solution for utility spaces requiring sustained light output and structural durability across a **9,000-hour rated average service life**.

Preheat Ignition Mechanics and Structural Task-Light Versatility

Sylvania F15T12/CW linear fluorescent tubes solve compact spacing constraints by combining a short, rigid glass cylinder with standard-pitch electrical connections. Running under a **Preheat circuit layout**, the fixture passes current through the end cathodes via an independent starter device for a brief period before striking the primary internal mercury arc, ensuring safe, stable starting parameters down to freezing temperatures. The large surface area of the **T12 glass envelope** spreads internal phosphors uniformly, dampening localized lamp glare while bathing tight under-counter nooks, workbenches, and utility paths in smooth light. This balanced configuration minimizes visual strain and dark spots inside commercial display showcases and low-clearance storage areas.

• 18-Inch Low-Profile Footprint: Ideal for specialized, confined areas where standard 4-foot or 8-foot industrial linear fixtures cannot physically fit.
• 4200K Cool White Phosphor Tuning: Delivers a clean, professional ambiance with neutral white rendering that boosts detail focus inside commercial work zones.
• G13 Medium Bi-Pin Interface: Hardened copper contact pins fit cleanly into standard linear lampholders, ensuring solid mechanical alignment and electrical flow.
• Extended Maintenance Cycle Yields: Stated 9,000-hour life is based on standard 3-hour ignition loops; driving the tube on longer continuous facility cycles reduces overall physical strike wear to push lifespans even higher.

Certified Ballast Compatibility Matrix

To preserve internal cathode coatings and ensure safe arc maintenance, this preheat lamp is certified for use with the following industry-standard ballasts:

• Advance / Signify: LC1420C-I
• Halco Lighting Technologies: #50108 E120RS/120
• Robertson Worldwide: RSW120T12120

Comprehensive Technical Specifications

• Brand Name: Sylvania
• Product Family / Series: Linear Fluorescent Task Series
• Ordering Product Code / NAED: 21532
• Technical Abbreviation Code: F15T12/CW
• Technology Class: Gas-Discharge Low-Pressure Fluorescent
• Ignition Protocol: Preheat Start (Requires compatible external circuit starter and ballast sequence)
• Bulb Shape Profile: T12 Linear Cylinder Tube (1.5-Inch / 38 mm Diameter)
• Nominal System Wattage: 15W
• Base Type Configuration: G13 (Standard Medium Bi-Pin)
• Initial Luminous Flux: 750 Lumens (Evaluated post standard 100-hour system burn-in phase)
• Mean Luminous Flux: 653 Lumens
• Color Temperature: 4200K / 4100K (Cool White Working Spectrum)
• Color Rendering Index (CRI): 60
• Average Rated Service Life: 9,000 Hours (Based on standardized 3-hour switching patterns)
• Nominal Product Length: 18 Inches
• Maximum Overall Length (MOL): 17.78 Inches (451.6 mm)
• Industry Manufacturing Standards: ANSI C78.81 – 2001, Complies with global linear fluorescent guidelines
• Wholesale Case Distribution: Packed in standard commercial quantities (**30 units per shipping case**)

System Integration, Circuit Requirements & Handling Safeguards

• Preheat Ballast and Starter Instructions: This linear tube **requires an explicit Preheat circuit configuration to ignite safely**. It cannot interface with electronic instant-start fluorescent ballasts engineered for T8 or T5 tubes. Ensure your host luminaire features an active preheat ballast paired with an electrical starter socket block; if the lamp flickers persistently without clicking on, replace the mechanical cylinder starter plug before changing the main tube.
• Electrical Voltage Continuity: Always shut down primary line voltage at the facility circuit breaker panel before removing old bulbs or completing retrofits. Check that the ballast input voltage aligns with building feeds to eliminate premature component degradation or excessive cathode sputtering.
• Environmental Space Restraints: This lamp operates ideally in dry, warm indoor conditions. When mounting inside damp-prone areas, such as enclosed boat cabins, wet RV bays, or under-sink areas, ensure the fixture features an airtight, moisture-resistant acrylic lens shield to protect the open G13 bi-pin terminals from moisture shorting.
• Responsible Disposal & Mercury Stewardship: Like all traditional fluorescent lamps, this item contains low trace levels of mercury required to ignite the internal ultraviolet arc. Do not shatter or throw spent tubes into common public trash bins. Route spent stock through verified commercial recycling programs or municipal hazard collection points. Visit **www.lamprecycle.org** for local environmental guidelines.

Recommended Professional & Commercial Applications

• Commercial Task & Architectural Under-Cabinetry: Perfect choice for kitchen food prep counters, retail cashier cubicles, dental lab workbenches, and breakroom coffee stations.
• Retail Merchandising Displays & Showcases: High-density linear illumination excellent for jewelry glass cases, retail product clothing shelves, and shadow boxes.
• Utility and Storage Room Lighting: Ideal for tight janitorial closets, residential workshops, garage benches, and low-clearance basement mechanical rooms.
• Specialty Mobile Transits: Built for classic 12V or inverted 120V interior lighting grids inside recreational vehicles (RVs), camper trailers, and motorboat cabins.