Thansk for your explanation. 
Te 12V DC power supply, the potintiometer you mention , is it the the plastic which have philips screw head? 
my dimmer just arrived yesterday. I have yet to open up to inspec what is inside , but it  felt like almost nothing and very light wieght. I have LED which spec at 10watts(running at 10V, 1A current). Theoretically should able to handle up to 8 LED per dimmer base on the label stated there 8A. For safety reason, i might just want to keep 6-7 LED per dimmer. 
		
	
		
		
		
		
		
	
		
		
	
	
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