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			 lighting hmmm seems simple enough.    well have a 180 gal. 2 ft deep running a 400 watt hamilton and a couple of 4 ft and 2 2 ft flourescents. Found a triple 400w or 250w 72" retrofit for around 350$ U.S. and am considering the upgrade. 250  or 400's?  I am thinking 250's would be plenty and if not i could incorporate my existing 400 for lots o light. I emailed to ask if his ballasts would run most bulbs and here is what i got back :   
		
	
		
		
		
		
			" Most bulbs? You are best to upgrade it to a pulse start so that you can run any bulb you like. You can do that for $15.00. You can also upgrade this ballast to an electronic dimable ballast for $55.00 per ballast or to an IceCap for $100.00 per ballast and they will run any bulb you like." I understand the advantage for a dimable ballast. Why would the upgrade to icecap be so expensive and what is the advantage. 
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