I often go for DIY stuff. Since my fish room is MINE, looks sometimes don't enter the question. How nice do you want it to look? I built these for cheap flexible lighting while I decided what I wanted and so far they are still in use.
They are not meant to be pretty but they are cheap and easy as well as easy to move around to see what they do for lighting the tank. I used 6500K rated bulbs and temporary construction bulb holders mounted on cheap extention cords. Tie-wrap ties make it easy to mount somewhere if a box is not wanted. I've since built canopies which cover them so I've not changed them out. I have less than ten dollars in each setup if one does not count the bulb price. Bulbs can run 1.50 to 3.00.