OSRAM DULUX L | 36W/840 | 4-Pin 2G11 Compact Fluorescent

The Osram 36W Dulux L is a high-output compact fluorescent lamp (CFL) engineered for high-performance architectural and commercial luminaires. Featuring a 2G11 4-pin base and a linear "twin-tube" T5 design, this lamp provides a significant 2,900 lumen output, effectively replacing 144W incandescent sources while consuming far less power. The 4000K Cool White (840) color temperature provides a clean, neutral white light that is ideal for offices, supermarkets, and industrial workspaces. With a length of 415mm and a rated service life of up to 20,000 hours when used with electronic control gear, it offers an exceptionally low total cost of ownership.

Product Overview

The Osram 36W/840 Dulux L is part of the Lumilux range, renowned for excellent color rendering and high luminous maintenance. Its 4-pin design makes it fully dimmable (1–100%) when used with suitable DALI or DIM ballasts, such as the Quicktronic QTi. This versatility allows for sophisticated light management in office buildings and public spaces. The lamp’s compact, flat-profile T5 tubes ensure uniform light distribution within shallow fixtures. It is a direct equivalent to the Philips PL-L 36W/840 and GE F39BX/SPX41, making it a reliable drop-in replacement for existing lighting systems.

• Lumilux Tri-Phosphor Tech: Maintains >80% brightness throughout the entire life of the lamp.
• Multi-Ballast Compatibility: Operates efficiently on electronic (ECG) and conventional (CCG) control gear.
• Instant Start: Achieves full brightness quickly without flickering when paired with electronic ballasts.
• German Engineering: Manufactured to strict standards for consistent color temperature across batches.

Technical Specifications

• Brand: Osram
• Order Reference: DULUX L 36W/840
• Wattage: 36W
• Luminous Flux: 2,900 Lumens (at 25°C)
• Color Temperature: 4000K (LUMILUX Cool White)
• CRI (Ra): 80–89
• Base Type: 2G11 (4-Pin)
• Dimensions: 415.0mm (Overall Length) x 17.5mm (Tube Diameter)
• ANSI Standard: C78.901
• Average Lifespan: 20,000 Hours (B50)

Cross-Compatibility & Ballast Data

For optimal performance and to maintain the Osram System+ Guarantee, use of a high-quality electronic ballast is recommended.

• GE Equivalent: F39BX/SPX41/RS (97615)
• Philips Equivalent: PL-L 36W/841/4P
• Recommended Electronic Ballasts:
  • Osram QTP-DL 1x36-40 or 2x36-40
  • GE #47534 (B224PUNV-C)
  • Sylvania QTP2X26CF/UNV/DM