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					Originally Posted by  midgetwaiter
					 
				 
				Small note, URI T5 bulbs are properly designated as V-HO.  They worked with Icecap to build bulbs that would last longer with their ballasts, provided adequate cooling they last a year. 
			
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 That is correct!  The key is the active cooling , i.e. having fans blowing on the endcaps and bulbs.  Having T5HOs in close proximity to high wattage MH bulbs without active cooling can really affect their output/lifespan.