Would you rather use LED with 30° or 140° viewing angle for Persistence of Vision display? I will have two columns (each column one color) of 16 LED, columns are very close to each other, cca. 0.1mm. Both LEDs have same mcd rating.
As I am restricted by current coming from the battery I could use only 2mA forward current LEDs, these LEDs have a typical 400mcd for green and 100mcd for red. Would you say that is enough bright? I really don't have any clue how do they look in reality based on mcd ratings.
Most importantly I would like to know how much is viewing angle important in this type of application ie. POV display.