My torch is doing just fine, actually doing well under a 28w T5 10,000k and actinic so I think you're fine for light. Make sure you have adequate water flow they like water to flow around them but not directly at them and yes if it's a new tank there could be dozens of reasons for it's withdrawl. 
If you live close to a fish store take a water sample in, have them verify the tests you've done, depending on the test kits you are using there may be a problem there. I've used the budget/inexpensive kits in the past and seen huge differences in readings from one kit to another, now I'm sold on Salifert and frankly, I'd rather spend my money on them, I feel confident in the quality and if my pH reads 8.3 I'm comfortable with it actually being 8.3 
 
Doug 
		
	
		
		
		
		
		
	
		
		
	
	
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