From what I've heard, the glass from the window and from the tank will block most of the beneficial wavelengths of light.  So although it may look brighter, I don't think it will help your corals.  IF you have an algea problem it can only make it worse.  Just pay attention to how your tank reacts and decide from there. 
		
	
		
		
		
		
			
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				Current tank:  120g 30g fuge 2x400w MH 220VHO
			 
		
		
		
		
	
		
		
	
	
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