Been considering a Nicrew for a 20 nano. Very affordable and has an optional controller with lots of positive reviews. Thinking a pair of 100w or pair of 150w getting the job done on that 40bNicrew hyper reefs, smatfarm, or the nicrew marine strip lights are the budget lights I would reccomend. The current USA lights don't pull as much wattage as the nicrews if I remember correctly and I think they just aren't as good.