Biosirus 

Tech Talk: The Lumen Myth

What matters most is how the eye sees the work surface. The two pictures of the same work space illustrates this effect.

Design lumens (Photopic) as measured by the light meter, can be often misleading. Pupil lumen (Scotopic) represents the sensitivity of the eye to interior lighting conditions and cannot be measured directly by light meters. This factor can be significant for high CRI lamps.  The combination of low bulb operating temperature (no reflector oxidation and bulb darkening effects) and pupil lumen  is key.  The same design lumen can have different "usable light output" and "apparent brightness". The resultant lux "magnification" for LED/Induction can be almost 1.7-2.0 times MH/MV/FL lamps, hence much lower wattages suffice.  Higher lumens does not mean higher "human eye" luminescence.

Advanced LED Lighting

Industrial, Commercial, Institutional, Municipal

  • High / Medium / Low Bay; Outdoor; Wall packs; Streetlights
  • LED COB; pf>0.95; CRI >80; R9 > 8.3; 80k+ hours

LED T8/T10/T12 Replacement Tube

Industrial, Commercial, Institutional, Municipal

  • Medium / Low Bay; Outdoor; Pathway
  • LED Tube; pf>0.985; CRI >80; R9 > 8.3; 80k+ hours
  • No changing out old magnetic/electronic ballasts. Can be connected direct to 120V or 240V ac supply.

Advanced Induction Lighting Systems

Industrial, Commercial, Institutional, Municipal

  • High / Medium / Low Bay; Outdoor; Wall packs; Streetlights
  • Electrode-less bulbs; pf>0.98; CRI >80; R9 > 31; 100k hours