Cloakers will always have their eyes glowing until killed.
Included is a retexture for the glowing eyes up from 16x16 to 64x64.

Requires BLT or SuperBLT.
Extract the 'Always Glow Cloakers' folder to mods.
Extract the 'HD Cloaker Eyes' folder to mod_overrides.

I recommend combining this mod with PDTH Styled Cloaker Reskin for a proper PD:TH flashback.

Also recommend HD Zeal Cloaker for Zeal Cloakers just because it looks better.