Multiple LED on arduino
Each pin on any Arduino (with some exceptions) can only handle 40mA MAX. Even the 5V and similar output sources can't handle more than 600mA, So I suggest you use them to power a MOSFET or Darlington to connect them in appropriate series and parallel connection counts.

Both the above transistors can handle high voltage, but you need to choose ones that correspond to a voltage that an Arduino can provide.

This is the most robust method if you want all the LEDs to light up at the same time. However for array addressable LEDs you might need extra BJTs coupled with resistors for each led, maybe along with two decided that would be appropriate for your application.