As the lighting of choice in fishrooms.I was at home depot last week and 4" t5! 28watt dual light strips for 34.99!bulbs included!At that price with the lower watt usage if they are as bright as I would expect a t5 to be I will be switching over my light as the shoplight ballasts go.
http://www.lithonia.com/Products/groups/Fluorescent/MS5/default.htm
http://www.lithonia.com/Products/groups/Fluorescent/MS5/Configurations/Basic.htm
http://www.lithonia.com/Products/groups/Fluorescent/MS5/default.htm
http://www.lithonia.com/Products/groups/Fluorescent/MS5/Configurations/Basic.htm