Pro/Con of combining two 12v power supply?

Ok, this could be a really stupid question but I thought I would ask anyways.

I have two 12v power sources for previous fogs but I am now wiring up my LED bar that is capable of handling 9-42V. What type of pro/con would I be looking at if I combine those two 12v power sources into one? I know it wouldn't make a 24v circuit but just seeing what would happen.

 

You will just continualy blow fuses

edit: If they are on different fuses that is.

 

you would still have only 12 volts, but less resistance in each feeding wire because of two 'power' legs..


now, if you could get it all figured out by hooking two 12v in a series, then you would be hammering 24v to the lights, more volts=more light...


here is a linkee for ya


http://www.12voltbattery.info/index.php?page=batteries_parallel_vs_series

 

Ya, when I was researching I found something similar but it seemed that I would probably have to add a battery specificly for the lighting system.

But could a large capacitor be used to collect the voltage or would that still run at 12v?

 

If the the 12v power sources have isolated negative outputs from the chassis ground, you could wired them in series for 24 VDC output. Just connect the negative lead of power source 1 to the positive of power source 2 and 24 VDC will be between the positive lead of power source 1 and the negative lead of power source 2. It is the same as wiring two 12 VDC batteries in series to produce 24 VDC. If the interconnection between the power sources is grounded, you will blow a fuse or damage the power sources every time power is applied.

One advantage is with 24 VDC, you will have half the current between the power sources and lighting load, which translates into a smaller wire and fuse size. Two of the disadvantages are more space for the power sources and power efficiency.