Welcome to the forum,
as mentioned above zoas can be pretty bright, maybe select a few with contrasting colors and ahving a few with green, yellow orange.... which looks great under actinic.
LPS I'd go for euphilias which add a lot of motion and look nice. Chalices can have very bright colors and are low/medium light as well.
SPS many chioces but if you want something bright I'd go for the ORA green birdnest, green monties, purple monties, green slimer, encrusting monties can also be very bright and rather easy SPS (mystic, rainbow, sunset...)
Welcome to reef2reef! Space invader chalice & space invade pectinia is super bright and easy to keep. Fungia are also easy, also very bright if you find a nice one.
Welcome to R2R! Could you share what your low light source is to help with the coral suggestions? You have quite a few good suggestions already, Please do a search on Palytoxins so you are aware and handle zoas and plays with proper care
Mushrooms, zoas, kryptonite candy canes, and acans can be bright and dont need a ton of light the one piece everybody loves out of my tank that doesnt need much light and I'm not joking when I say you can see it 40 ft away from out side my house is my insanely bright green leather coral.
Welcome. My first corals were a frogspawn , a gorgeous orange ,green and blue ricordia and some zoos. The ricordia multiplied like crazy! In fact just fragged enough of them to trade for my first Acroporas! Earned enough for 4 frags!