Looking for simply eevee material for glowing/emitt objects

Hello,
I’ve a scene with some random entities (see example https://youtu.be/zNuRfcHh1Ak)
I want to add a glowing or emitt effect with custom power, example from 0 low glow to 9 high glow
I don’t know how to do this without extreme ressources needs because there are already 50 entities and the scene already needs ressources. I already tried some guides but they need to much ressources
Ultimately this scene should be animated with a natural selection of entities with births and deaths.
Someone can help me with this effect pls ?
Thank you

can you be more specific?
Wich engine eevee? cycle?
compositing glow?
You can easily do it randomly with one material with the object random output with only one material.
see attached file.
Random_Glow.blend (795.1 KB)

Thanks skuax for this answer
I use eevee and I wish a compositing glow yes (which I’ll adapt ton python script after)
When I reproduced your solution, it burn my models


The body should be “red” maybe you can better see what’s the problem with an example of my blender file http://pasteall.org/blend/index.php?id=52784

for glowing in EEVEE you can use the Bloom effect with emis material

happy bl