So the idea came to me in the Tunnel of Terror Gate in 2015. I noticed that the light shining in front of ship is also the range of your lasers. So taking screenshots of your ship in every direction should give you an idea of what your range is. This changes from person to person depending on your screen resolution and other factors.
What you will need:
adobe photoshop (or other image editing software)
Custom Desktop Logo 2.2 [

Background quality above 'Low'
Step 1:
Go in ToT gate. clear all waves but dont jump to next map. find a spot where background is mostly blue in all directions (you cant see light when shined on empty black space).
Step 2:
position your ship facing up. take a screen shot. paste in paint or whatever and save. do that at least 3 more times, facing right, down, and left. i took screen shots every half position to have a more clear overall image to work with.
Step 3:
put all screenshots in one document in photoshop. select all layers and change blending mode from normal to lighten. now you can see your laser range.
Step 4:
now we need to get the eclipse tool and fit it right around the edge of the light.
Step 5:
hide/remove everything so only eclipse is showing with transparent background. Trim canvas. save as PNG in an empty folder.
Step 6:
download, install, and open Custom Desktop Logo 2.2
Step 7:
change image folder to where you saved your PNG
Step 8:
go to x-1 map and shoot npc to adjust position and size if needed. change opacity to 30