Arduino RGBW 24v LED strip driver
I remember using the BS170 for driving "small" LED-strings.


N-Channel
500mA Continuous Drain Current (Id)
60V Drain-Source voltage (Vds)
2.1V Threshold Voltage (Vgs), which is ideal for arduino's 5V outputs
TO-92 package, you can bend the pins to fit a breadboard


See BS170 LED arduino example for an example on how to use the BS170