What to achive: More complex lighting or a workaround for this
Issue: surface light are always rectangular
What have been tried: diving the light into multiple smaller surface light, using other kinds of light, unions, meshes - none of this either produce a similar result or one with lighting glitching or stacking.
If you just increase the angle of the surface light and give it distance you cant really tell its rectangular. Otherwise use point lights in addition. Its hard to give more advice when we dont know exactly what you want to achieve.
Instead of having the surface light emit from above the lights on that ceiling, place surface or point lights inside the light parts… they shouldnt clip Iike this.
I never use Surface lights because of a few reasons including this. There is no great way to get around this, and shadows with Surface lights are really pixilated.