I use different tank, both in size and shape and I also know that I am not likely to get exactly the right light as things grow and change what is needed. That leaves me first wanting cheap so that I can swap and change as I want and it also has to be flexible. That leaves me using old style tube lights as they are now cheaper, some CFL as they are handy and then my favorite for all points is one I pick up off the auction. Links are not allowed but a search for this will often turn up the bulbs I like:
e27 led bulbs 5050smd high bright spotlight 85-265v horizontal plug light C962
Horizontal mounted LED that one can screw into any common bulb holder but they have lots of different LED number, color, etc and a cheap price. One advantage of these over many LED for room lighting is that the light is all put out in one direction.
For a ten gallon, I might look at some of the swivel arm type lamps that can be picked out of salvage stores for nearly nothing as they are quick easy and let me put the light where I want it, rather than where the fixture puts it!