CIRAS-3 Operation Manual V. 1.09  57  support@ppsystems.com 
 
 
Light Control (Optional) 
An optional LED Light Unit is available for all PLC3s. 
PLC3 Universal LED Light Unit (RGBW) 
This LED light unit features 48 
LEDs, 12 each of RGBW (red-
green-blue-white) color.  You are 
able to set any single color from 
0-100% using the light source, or 
you can combine colors in any 
proportion to recreate the spectral 
distribution of a specific natural or 
artificial light source.  With full power available to the cuvette the normal intensity output range will be     
0-2500 µmol m
-2
 s
-1
.   
Caution: do not look directly at illuminated LEDs, even with the light unit set 
to lower intensity control levels. 
Please note.  Maximum light intensity and range of temperature control is 
dependent on RGBW settings. 
 
The PLC3 Universal LED light unit is designed to mate quickly and easily with the PLC3 Universal leaf 
cuvette.