The problem with the "Light panel" object is it hasn't a lampshade, so the light hits the ceiling directly. If you try with the minispot (don't mind the word "mini", you can enlarge it as needed) you will get the expected result. If you don't like the minispot shape, you can always use the light panel and build your own lampshade using boxes, or create your complex model using Blender or similars.

Here an example using 2 enlarged minispots at 10% power: