How to see color with rods
Cone colors - higher radiances
After dark adaptation, strike a match and light the candle, or ignite the cigarette lighter.
Hold the CIC print close to the light source.
Observer the colors. Note the difference in color between the letters C and the letter I.
When the firelight is near the print, it is seen by L-, M-, S-cones.
Rod/L-cone colors - lower radiances
Move the CIC print 4 to 6 feet away from the light source. Observer the colors.
Note the similarity in color of letters C and the letter I.
When the firelight is far from the print, it is seen by rod/L-cones.
Repeat
Move the illuminant back near the print and observe the color of the letters
Select your Fire light source
Find a candle, matches and candle holder with suitable tray to catch any dripping wax. Alternatively, find a cigarette, or cooking grill lighter. Place your light source equipment on a tray in a way that it is easy to find in total darkness.
Print CIC Image
Copy this CIC image and make a paper print using a digital printer.
Light-free dark room
Find a completely dark room that is free of papers and other combustible materials.
Doing this experiment at nighttime will help a lot.
Dark adapt
Sit in the dark for at least 10 minutes. To be fully dark-adapted, you need to sit in the dark for 30 minutes.
Perform experiment
