The regular Finnex Fugeray should have you at medium high light if their PAR rating is true. Since your tank doesn't have much height. You could go with the Ray 2 but you would probably need to hang it.
Live stock would help keep the tank going with some nitrates. Why not add a single betta or something else?
Thanks I'll check out the Finnex Fugeray, I'm not really able to hang any lights unfortunately.
And yeah a betta could be possible I do have on in my 60L at the moment though so maybe something else. My local shop has a school of neons in there, about 6... Not sure if it is quite big enough for that to be honest.