Lots of lights will allow you to grow plants, the big problem is that due to the shape of the tank, if you count the end opposite the pointy end as the front, then lighting attached to the tank is going to be at a 45 degree angle. So aesthetics are not going to be ideal that way... personally I would go with a pendant, or something on a gooseneck on the tank, for example a kessil light, and have that sort of centralized.
The platic hood will let you have the lights across, but theere's a layer of plexiglass in there, and it's really not ideal, nor is the glass top where it opens from a short side across to the longest side (Difficult to explain, I know)
My personal preference, unless there's a good reason to go with the pentagon aquarium, would be to get a 2 foot cube (24"x24"x24"_ which won't use up much more floorspace, except for that cut off corner, and give you many more options for lighting and aquascaping,
The platic hood will let you have the lights across, but theere's a layer of plexiglass in there, and it's really not ideal, nor is the glass top where it opens from a short side across to the longest side (Difficult to explain, I know)
My personal preference, unless there's a good reason to go with the pentagon aquarium, would be to get a 2 foot cube (24"x24"x24"_ which won't use up much more floorspace, except for that cut off corner, and give you many more options for lighting and aquascaping,
I'm not a fan of discus (same issue, BIG!), but they're lovely. Make sure the TV stand is solid--most aquariums weigh more than newer TVs.