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			#7  
			
			
			
			
			
		 
		
		
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			 Get a roll of Reflective Mylar from a hydroponics store.  It is supposed to be 98% reflective. 
		
	
		
		
		
		
		
	
		
		
	
	
	Costs about $25 for a 4' x 100' roll.  |