Sylvania 24683 F40DSGN50

SYLVANIA 24683 | F40DSGN50 Octron® 900 Series 40W 5000K T12 4-Foot Linear Fluorescent Lamp

The Sylvania 24683 (F40DSGN50) is a professional-grade, high-performance **40W linear fluorescent lamp** from Sylvania’s premium **Designer 900 Series**. Measuring **4 feet (48 inches)** in length, this heavy-duty **T12 tubular lamp** features a standard **G13 Medium Bi-Pin base** engineered for absolute architectural drop-in compatibility. Engineered with advanced rare-earth tri-phosphor chemistry, it emits **2200 initial lumens** of crisp, vibrant **5000K Daylight** light with an elite color rendering index (**CRI 90**). Delivering exceptional color accuracy and an extended service life up to **28,800 hours**, this lamp is optimized for precision-demanding retail, commercial workshop, and institutional environments calling for flawless true-color visualization.

Elite Designer 900 Series Tri-Phosphor Optics

Sylvania Designer 900 Series fluorescent lamps utilize a premium phosphor blend that maximizes color accuracy without compromising light output. Unlike standard commercial daylight lamps that distort textures under a cold, bluish hue, the **F40DSGN50** targets a highly calibrated **5000K spectral profile** with an exceptional **90 CRI**. This full-spectrum performance delivers sharp clarity and accurate color matching, making it essential for retail showcases, auto body paint bays, design studios, and medical evaluation rooms. Its high-efficiency coating ensures an impressive **1890 mean lumen rating**, maintaining clean light distribution across its lifecycle.

• Extended Maintenance Longevity: Rated for an operational lifetime spanning between **20,000 and 28,800 hours**. Total longevity is governed by ballast type and switching intervals; increasing continuous run lengths beyond standard 3-hour test cycles will unlock maximum operational life.
• Industrial T12 Profile: Features a rugged 1.5-inch diameter hard-glass construction built to withstand ambient temperature fluctuations in both covered indoor track networks and protected outdoor luminaire housings.
• Flawless 90 CRI Precision: Minimizes color distortion in high-visibility environments, ensuring textiles, paint profiles, and artwork reflect accurate tones without color casting.
• Cross-Brand System Replacement: Serves as a premium drop-in substitute for standard industry counterparts, including Philips F40T12/DX and GE F40/D/ECO.

Technical Specifications

• Brand: Sylvania
• Product Code / NAED: 24683
• Ordering Abbreviation: F40DSGN50
• Series / Product Family: Designer 900 Series
• Technology Type: Linear Fluorescent (Tri-Phosphor)
• Wattage: 40W
• Bulb Configuration: T12 (1.5-Inch Cylinder Diameter)
• Base Type: G13 (Double-Ended Medium Bi-Pin)
• Initial Lumens (at 25°C): 2,200 lm (Evaluated after 100 stabilizing burn hours)
• Mean Lumens (at 25°C): 1,890 lm (Evaluated at 40% of rated life)
• Color Temperature: 5000K (Daylight Spectrum)
• Color Rendering Index (CRI): 90
• Average Rated Lifespan: 20,000 to 28,800 Hours (Based on standard operational metrics)
• Maximum Overall Length (MOL): 47.78 Inches (4ft / 1213.6 mm)
• Operating Position: Universal

System Installation & Ballast Maintenance Guidelines

• Ballast Requirements: This linear T12 tube must be operated exclusively with compatible rapid-start or instant-start ballasts matching ANSI electrical specifications for 40W T12 circuits. Operating on non-compatible hardware will lead to flashing, delayed ignition, or premature cathode burnout.
• Physical Application Fields: Tailored for use in standard 4ft indoor and protected outdoor fluorescent fixtures. Before installation, confirm circuit lines are turned off at the breaker and allow the fixture to sit for 15 minutes to cool completely. Gently slide the G13 pins into the socket tracks and twist 90 degrees until the lock engages securely.

Recommended Commercial Applications

• Commercial Workshops & Industrial Bays: Provides daylight lighting for manufacturing floors, textile mills, auto detailing areas, and inspection stations requiring close observation.
• Retail Displays & Showrooms: Accents home furnishing centers, hardware stores, and apparel aisles with full-spectrum light that brings out accurate colors.
• Institutional Buildings: Ideal for school laboratories, medical cleanrooms, and municipal maintenance bays calling for reliable, color-accurate linear lighting.