Philips 219931 FB40DX/6 40W U6 Daylight

PHILIPS 21993-1 | FB40/DX/6 U-Bend T12 | 40W 6500K Daylight Deluxe

The Philips 21993-1 (FB40/DX/6) is a specialized U-bend fluorescent lamp designed for 2x2 ceiling troffers and compact commercial fixtures. Featuring 6-inch leg spacing and ALTO® low-mercury technology, this 40-watt T12 lamp delivers a powerful 6500K Daylight Deluxe light that mimics natural arctic-white sunlight. With a high 90 CRI, it provides exceptional color rendering, making it ideal for retail spaces, hospitals, and office environments where visual clarity is paramount. This rapid-start bulb is engineered for a long 18,000-hour rated life, ensuring reduced maintenance cycles and a lower total cost of ownership in high-traffic applications.

Product Overview

The Philips FB40DX6 (Daylight Deluxe) is an industry-standard solution for square fluorescent fixtures. Its unique U-shape allows for high-output illumination in compact footprints that cannot accommodate standard 4-foot linear tubes. As an ALTO® series lamp, it is TCLP-compliant and environmentally responsible, containing significantly less mercury than standard fluorescent bulbs. The Rapid Start mechanism ensures flicker-free ignition and reliable performance when paired with high-quality magnetic or electronic T12 ballasts. This lamp is specifically designed for environments where "refreshing" and "cool" light is needed to enhance productivity or simulate outdoor conditions.

• High Lumen Performance: Produces 2,250 initial lumens for bright, uniform coverage.
• Superior Color Quality: A 90 CRI rating ensures that fabrics, paints, and products look their most natural.
• Eco-Friendly: Low mercury content helps reduce environmental impact and simplifies disposal.
• Case Pack Value: Sold in a 12-lamp case to ensure consistency across large-scale facility retrofits.

Technical Specifications

• Brand: Philips ALTO
• Order Code: 21993-1 (219931)
• Model Number: FB40/DX/6
• Wattage: 40W
• Base Type: G13 Medium Bi-Pin
• Bulb Shape: T12 U-Bend (6-inch spacing)
• Color Temperature: 6500K (Daylight Deluxe)
• CRI: 90
• Initial Lumens: 2,250 lm
• Rated Life: 18,000 Hours
• Dimensions: 22.44" MOL x 1.5" Diameter
• Quantity: 12 Lamps per Case

Safety & Installation Guide

• Ballast Requirement: Operates on standard T12 Rapid Start ballasts. Ensure your ballast is rated for 40W U-bend lamps.
• Spacing Check: This is a 6-inch spacing model. Measure the distance between the lamp legs before purchasing to ensure compatibility with your fixture's socket layout.
• Handling: Fluorescent lamps contain mercury. If a lamp breaks, follow local EPA guidelines for cleanup and disposal.
• Maintenance: For maximum brightness and color consistency, it is recommended to "group relamp" fixtures when bulbs reach the end of their rated life.

Primary Applications

• 2x2 Troffers: The standard choice for square office and school ceiling fixtures.
• Signage: Ideal for backlit commercial signs and lightboxes requiring daylight-balanced light.
• Retail: Perfect for areas where high color accuracy helps move merchandise.
• Healthcare: Provides the "Arctic White" light often preferred in clinical and laboratory settings.