We're planning to install led lighting in vented vinyl soffits around the exterior of the house. We want 6 lights on the rear of the house which are controlled by an indoor dimmer switch and a timer. On the front of the house we want six more lights on a separate dimmer switch and a timer. I've started looking and am interested in low voltage, clip in led fixtures (such as AspectLED and Delphitech) which seem to offer easy installation. Do I need separate power supplies/drivers for the front and back to make this work? I'm unsure of the equipment needed to incorporate a dimmer and timer. Thank you for any recommendations.