converting pc lights for a minibow

I am buying a 5 gal minbow for my room and I want to add light. I was wondering if it is possible to take the 15 watt pc light it comes with and switch the socket around with a dual light socket. Than I would put two skrew in 10 watt pc bulbs. Can the ballast handle this? if anyone has any info on this it would be great because I dont want to start buying stuff unless I know I can make the light work.
Thanks,
Alex
 
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