Would it be possible to eliminate the jitteriness in Obi-Wan’s lightsaber in ANH to make it look like the Prequel glowsticks? How 'bout the reverse and make Anakin’s in RotS pale and jittery? Would make for greater contrast and consistency. I guess it’s not worth the effort.
For reducing would perhaps require a misc algorithm. For jittering up would require minimal masking and messing around with the opacity a bit.