Throwing my two cents here.

Yay red lightning.

But keep in mind, it’s not really red like a lightsaber. It’s got a pink-ish hue.
https://vignette.wikia.nocookie.net/starwars/images/2/2a/Epguide316.jpg/revision/latest?cb=20120312233700

Also, I’d make sure every time he uses his Sith Lightning is red. So both when he’s firing it at the fleet and when he’s shooting it at Rey. Otherwise it’d just get confusing.

On a completely unrelated notes, has the fact that he magically gets his Windu-deformations and new clothes ever been discussed? Cuz as it stands, he got rejuvenated, then ran behind the Sith Throne, got naked, but on new clothes, and ran back around to walk through the fog and go “look what you have made”.

Maybe someone could try superimposing Sidious’ red robes over the robe he wears when he’s goading Rey into killing him. That’d be a start.

Also, has it been already suggested to making the Sith Eternal Acolytes chant “Sidious” instead of “Palpatine” (them calling him by his Sith name makes more sense)?