Rich883 posted:This one looks nicehttp://www.ebay.com/itm/10A-30...c:g:nVYAAOSwqBJXUIWJ
It will provide up to 30 volts of dc voltage with 10 amps of current. both the dc voltage and the current limit are adjustable. If you think of the DC voltage adjustment like the handle on the Z4000, you can set it to your desired 8-11 volts. Given you indicate you are drawing 4-5 amps per side, I think the 10 am supply would work just fine, I think it is about $65 with free freight. Plus this is a complete unit, plug it into the wall, and connect to the GND and + (Green and Red) terminals posts on the front to your lighting wires. You have a fine and coarse voltage adjustment to get the voltage (brightness) you want.
I bought the same one, it was a few bucks less with free shipping, but they seem to have sold out. Works well and delivers 10A as promised. It's a switching power supply, and there is a fan that runs when you're drawing significant power, something to consider. I'm using it as a bench supply, so it's not an issue.
