In SX Microcontrollers, SX/B Compiler and SX-Key Tool, George Herzog wrote:

A shift register would be a good solution.  LEDs don't like to be in parallel as one may hog more power and cause a destructive imbalance.  Putting them in series requires driving with a higher voltage.  That mean a dual power supply and switching transistors or MOSfets handling the control of groups.  

With the shift register [maybe two or three in series], you can stay with 5 volts and have each controled individually.

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