Are you certain the red gyra light has an LED and not just a red plastic lens? I saw a youtube vid of a SP unit. The red gyra was dark and they had programmed the cab mounted headlight with a gyra effect.
It’s odd that they might have done that; one might say unbelievable… But they put the wrong sound in them too, so it wouldn’t surprise me if it’s just a red plastic lens. (Atlas did the same on the SD24s).