Hi,
I'm trying to light a tower light like this one:
http://www.metaltex.com.br/downloads/TPS.pdf
It is 24V and I was wondering how I could power it with arduino. The programming part isn't a problem. I just can't figure the eletrical part out.
Thanks!!
You can't power it from an Arduino. The Arduino (Mega / Uno / Nano / Pro Mini) is 5V and can't supply significant current, especially when connected via the barrel jack.
But you can drive it. Search for "Arduino mosfet". Basically, you just need a mosfet 
Thanks, I'll look it up!!
The lights are replaceable. Just put in the ones you want!!!!
Paul