3 rebels on a star - any ideas?

[aussiebuddha]

Hi all

I've been pondering for a while to the idea of buying a 500lmn light.
Just came to my mind that i could achieve the same or more lumens by using a 3xrebels in a star.
http://www.luxeonstar.com/item.php?id=5537&link_str=1430&partno=7007-PWC-10-3
Reason why i'd use rebels instead of crees would be the size.

Is this feasible or there's something i'm not thinking of?

If so
would would be the driver needed?
Also, what would be the reflector needed?

Thanks