Forge Version: forge-1.10.2-12.18.2.2110
AE Version: 30a978b

I did not use/try OptiFine.

So on the ME Controller when turned on half of it get "somewhat dark" not sure if this is a graphic setting or a known issue or even a feature, just seemed odd:

See the red outlined areas on the NOT powered controller being evenly "lit" up
and on the POWERED controller being somewhat darkened out to the left 2/3 of it:

EDIT: This is not due to the Animation, the animation goes on and the darkness stays.

Yeah, this is probably due to my attempted fix for optifine. I'll have to look into it. We may have to revert to our old (even hackier) approach for Forge, while we use this one to at least get it to render somewhat acceptably for Optifine.

Ah, alright, kind of thought it would be about that since I've seen that optifine work around in the commits as well.
Considering I'll probably have to use optifine later on too, I guess its fine :P

@shartte Yep fixed in 5954499
with AND without Optifine :)

(EDIT: I also updated forge to: 12.18.2.2114 since I added this issue
(Every other information can be found in the Second screenshot where F3-debug info is on)

See screenshots:

Without Optifine:

With Optifine:

This should be fixed by 5954499. Can you validate that on your end?