Osram DULUX L 40W/840

Cool white light. Energy-efficient 40W professional elongated energy-saving lamp with 2G11 plug fitting (4 pins) and a long lifespan of 20,000 hours.
EAN code:
In stock
Delivery time:
1-2 days
Buy 10 for €11,01 each and save 5%
Excl. tax

(€14,02 Incl. tax)


Electrical data

Rated power 40.00 W
Rated power 40.00 W

Photometric data

Nominal luminous flux 3500 lm
Light color according to EN 12464-1 LUMILUX Cool White
Nominal luminous flux at 25 °C 3500 lm
Luminous flux 3500 lm
Color Temperature 4000 K
Color rendering index Ra 80…89
Luminous flux (LLMF) at 4,000 h 0.90
Luminous flux (LLMF) at 6,000 h 0.88
Luminous flux (LLMF) at 8,000 h 0.85
Luminous flux (LLMF) at 12,000 h 0.84
Luminous flux (LLMF) at 16,000 h 0.81
Luminous flux (LLMF) at 20,000 h 0.80
Luminance 2.3 cd/cm²


Diameter 17.5mm
Total length 530.5mm
Tube diameter 17.5mm
Length 533.0mm
Length according to IEC 535mm
Length with lamp base, but without pins 533.00 mm
Outer flask T17.5
Maximum diameter 17.0mm

Temperatures and operating conditions

Ambient temp. at max. luminous flux 25.0 °C


Nominal Lamp Life 20000 h
Average lamp life 20000 h
Service life 13000 hrs  
Functioning lamps at 2,000 h 0.99
Functioning lamps at 4,000 h 0.99
Functioning lamps at 6,000 h 0.99
Functioning lamps at 8,000 h 0.99
Functioning lamps at 12,000 h 0.95
Functioning lamps at 16,000 h 0.81
Functioning lamps at 20,000 h 0.50
Operating mode LLMF/LSF HF
Lifespan 20000 h  

Additional product data

lamp base 2G11
Mercury content 2.5mg
Product remark Only for operation with ECG


Dimmable Yes
Suitable for indoor use Yes

Certificates & standards

Energy efficiency class A+
Energy consumption 44 kWh/1000h

Country-Specific Formats

International Lamp Coding System FSDH-40/840-/P/-2G11-43.9/533
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