I recommend the fluval spec if you can get it cheap. Petsmart or petco sell them cheap or u can get a used one. Use the stock led as a sump in the back. Just modify the back so it goes filter pad, carbon, ceramics, then use eggcrate to make a guard for the chaeto the light easily penetrates the frosted back glass. It works well. Slide a small adjustable heater along the side of the back. It's fairly simple and works very well. I wouldn't bother with a par bulb. Just do a simple diy led system. An as-is 4.25x3 heat sink. 3 royal blues and two cool whites. The cheapest meanwell driver or get a dimmable one. Can be very cheap if u play it right. That light would be able to support anything. U could easily keep it under $200.