The Dura Dulux D 26W is a 26-watt compact fluorescent lamp (CFL) with a double-turn pin-base design, available in warm or cool white color temperatures, designed for indoor commercial and industrial lighting applications.

Key Specifications
Wattage: 26 W nominal, 26.9 W construction wattage 
Luminous Flux: Approximately 1750–1800 lumens depending on the variant 
Luminous Efficacy: Around 65–70 lm/W 

Color Temperature:
3000 K (warm white)
4000 K (cool white)
6000 k (day light)
Color Rendering Index (Ra): ≥ 80, providing good color fidelity 

Light Source Type: Non-directional CFL with double-turn tubes (CFLni)
Base Type: G24d-3 (two-pin) for 827/840 variants; some 4-pin G24q-3 versions exist for D/E series 
Dimensions: Diameter ~12 mm; overall length 163–172 mm depending on form factor 
Service Life: Typically 6,500 hours (standard) up to 20,000 hours with compatible electronic control gear 

Dimmability: Many standard two-pin models are not dimmable, whereas D/E 4-pin versions support dimming 
Operating Temperature Range: -5°C to +40°C 
Energy Efficiency Class: G; energy consumption around 27–32 kWh/1000h 

Applications
The Dura Dulux D 26W lamp is suitable for a variety of indoor environments, including:
Offices and public buildings
Shops, supermarkets, and department stores
Hotels and restaurants
Industrial settings requiring consistent, efficient lighting