This is a very small script mod that adds glowing eyes to all plumbdroids and simdroids. It will add the glow to ALL of them in your town. Regular plumbots and simbots remain visually unaffected.

There are a few ways you can make plumbdroids:
Build a plumb-droid without MC
How to make a plumbot look like a sim.
Making an android/robot hybrid plumbot

You will need Ambitions EP to make simdroids and Into The Future EP to make plumbdroids. You'll need at least one or the other.

This mod is not compatible with aWT Eyeball Sliders due to the custom eyeball mesh being set to shader "SimSkin" instead of "SimEyes". If you like the smaller iris of the aWT eyeball mesh and don't mind to lose the sliders, this mod can work with the aWT eyeball if you modify the mesh as explained in these instructions.

If you'd like additional variety of eye appearance for your plumbdroids or simbots, you might be interested in Illusive Man Eyes and Other Robotic Eyes.

Additional Credits:
misukisu - Her script to disable vampire eye glow gave me the idea on how to make eyes glow.
egureh - For the writeup on how to make a plumbdroid.