Osram 645957 FH 21W/827 G5

The HE 21W 849mm Lumilux T5 lamps produces up to 104 lumen per watt, & 2700K Color. Osram Lumilux T5 HE lamps from OSRAM offer an extremely high luminous efficacy and therefore excellent economy. The benefits of LUMILUX T5 HE lamps are most obvious in office lighting where they offer energy savings of up to about 30 percent..

• Up to 10% higher luminous efficacy of the LUMILUX T5 HE lamps compared with T8 lamps
  

• Up to 8% more light thanks to much less self-shading from the slimmer lamp
  

• Up to 10% higher luminaire efficiency because the Temp for optimum luminous flux has been raised to 35°C

• HE stands for High Efficiency.
  
• This system offers excellent properties such as good luminous flux behaviour,
• Impressive economy and improved environmental compatibility.
  
• With a tube diameter of only 16 mm
  
• These lamps offer an extremely high luminous efficacy of up to 104 lm/W (at 35 °C).  
• They are designed for ECG operation and are up to 20% more efficient than LUMILUX T8 lamps.
• With hot restart ECGs,
  
• T5 lamps achieve an average life of 20,000 hours and a service life of 16,000 hours.
• They also enable extremely slim and compact luminaires to be created
• Suitable for ECG operation only/Lamp designed for internal luminaire
•  temperatures of 30…40 °C; optimum luminous flux achieved at 35 °C