I have a 24v power supply. I work for a sign copany part time and came across a 120volt(AC) in 24volt DC out 5A power supply for led lighting. It's for closed outdoor locations. It was a retro fit so it is virtually brand new. I want to use it for the lighting on my layout. My problem is that i need to down grade it to 12v. Is there an easy way to do this? It has no manual control for voltage so that isn't an option.