Transistors and Resistors

Using Arduino General Electronics
15

So thanks to your guys help my latest solution is thus:

2n2222 transistors with 270ohm base resistors - requires 2.75ma to saturate at 220ma load

TIP120 transistors with 2500 ohm base resistors - requires 0.25ma to saturate at 500ma load

2W 10ohm resistor for the 1w LED at 5V <500ma running from the 5v arduino pin

Questions:

Will it work?

Is 0.25ma to saturate too low a value for the TIP120, it is only small cos of lots of gain?

Thanks so much for the help