You can save money on lighting by going with a 36" T5 light fixture. A two bulb unit is cheap and the par, spectrum, light quality,and clarity is still superior to LEDs imo. If you have been on this site you know that most LED fixtures lack the red spectrum.
You could also go with a four bulb unit for a higher light tank and the best tank coverage possible. With two plugs controlling a pair of bulbs each you can still achieve a dawn dusk affect. Just look for a Hydroponic fixture; fixtures marketed for aquariums are more expensive.