great deal, really is only bout 20-30 bucks more. includes bulbs--->http://www.htgsupply.com/Product-HTG...T5-Fixture.asp
10,000 lumens roughly double the output of T12 and t8 2 bulb fixtures plus t5s are the most efficient flouro light available.
cheaper per bulb than the 4 foot 4 bulb they have. id just get one of these and get more of em when/if needed in future.
at least now you educated OP, now the choice is all yours