Use arrows to point the direction the terrain goes, for better usability, but I can tell what the depth map is attempting to show. It mostly works. For the lighting, do one more layer, and using the same or a similar color, splash on some Linear Dodge or Screen to get a bit more of that lightsaber glow on the light source, or brighten up the spot the light is specifically hitting a bit more instead of just having that spot be 'the most color'. Right now your gradient is just the amount of color that's present, but if you fiddle around so there's a bit more of a glow to it with different layer sandwiches, you'll result in a more "luminescent" effect, I guess. Right now it reminds me of watercolor paint.

I respect the brave choices of going all out there with your colors and if that's what your heart is calling out for, then do it until you're happy with it. If you're not, that's because you'll benefit from a bit of color theory.

Try picking on your color wheel:
-Two colors that are across from each other.
-Three colors that are in a triangle from each other
-Three colors that are in a Y shape from each other.
-Four colors that are in a :: shape from each other (so not quite a square, but like, a squished rectangle)
-Four colors that are in a ) shape along one side of the circle.

These can be distributed however you like for lighter or darker colors.

Or try:
-Only warm colors for the lighting, only cool colors for the shadows, or the other thing (warm shadows, cool highlights)

Or try:
-All shadows are a desaturated version of the color, all highlights are a highly saturated version of the color.

Right now, if the setting is 'night club' you do whatever you want.

I actually like the Landing Platform coloring quite a bit. It does not say 'lights' to me, it says 'eerie shadows'. That might be why you don't like it, if you wanted luminescence and ended up with mood. It reminds me very much of Nar Shaddaa. The only part which triggers my brain to think of luminescence is on the bottom middle, where the purple hits the office, and only when it overlaps the wall. The street light itself could have a dot of lighter color right in the center to be emitting that halo, and then it would sell it better. But, your players are also damn lucky to get all this awesome art and don't mind my critiques if you're happy with them.