I'd say go 4xT5 HOs like this one http://www.marinedepot.com/AquaticLife_T5_HO_4_Lamp_Light_Fixtures_w_Lunar_LEDs_24_Inch_T5_Fluorescent_Light_Fixtures-AquaticLife-AK01035-FILTFIT54U-vi.html">http://www.marinedepot.com/AquaticLife_T5_HO_4_Lamp_Light_Fixtures_w_Lunar_LEDs_24_Inch_T5_Fluorescent_Light_Fixtures-AquaticLife-AK01035-FILTFIT54U-vi.html</a>.
Your tank is only 12" deep. You'll get plenty of light (200W+) for anything you want to keep. This fixture includes the controller as well, which will save you some $$ since as soon as you get different bulbs and moon lights, you'll want to have them on different schedules.
If you are going to skimp, skimp on the sump. That's the perfect thing to buy used here.