For the highest standards in practice 

  Sim.LED 3500+
a distance of 1 m
Sim.LED 350
a distance of 1 m
Sim.LED 250
a distance of 0.5 m 
Sim.LED 250
a distance of 1 m 
Central illumination [lx]
 60,000  60,000  55,000  25,000
Electrical dimmability from/to [lx]  25,000 – 60,000  30,000 – 60,000  -  -
Color temperature [K]
 4,500  4,500  4,500  4,500
Field size d10 [mm]
 170  170  111  165
Color rendering index Ra  96  96  > 93  > 93
Red rendering index R9
 96  96  -  -
Power consumption [W]
 15  25  15  15
No. of LEDs
 18  9  3  3
Light head weight [kg]  3  3  2,9  2,9
Approval  CE  CE  CE  CE
LED lifespan [h]  > 50,000  > 50,000  > 50,000  > 50,000

Tolerance ±10% 
Technical specifications are subject to change