One of the more challenging aspects of this hobby is patience.  I would suggest to you to wait and save up the money for the light that you really want, even if it takes you a year.  Ask your neighbors if you can mow their grass or weed their gardens to earn some more money for the light.  For me, anytime I have bought a piece of equipment because it was was cheaper, I usually end up  buying the one I really wanted later.  Doing this costs more in the long run (and is money you could have spent on fish and corals!)