RGB SMT LED Cube, resistors, drivers, and shift registers.

I took some data with two different transistors, a 2N3904 and a PN2222.

I ran the 2N3904 out past recommended Absolute Max.
What's not across the load (VL is across VCE.

Clearly, the PN2222 has more gain.
If you don't like comparing the 32? load data, the PN2222 does a lot better job with 67? load. It's able to sustain > 120mA collector current with 1mA base current.
I'm using resistors for load because I don't want to string out a bunch of LEDs.

[Given the 32? example: 3 Greens in series (= 6V) with a 220? resistor would result about 10mA; so, 24 of those circuits in parallel would have the same effect (240mA).]

This is what I was trying to get you to do in Reply #101.