Probably a stupid question whose answer is already known, but humor me:
In Harmy’s Despecialized Edition of SW 1977, it’s clear that Luke and Obi-Wan’s lightsabers are the same shade of blue. However, for some reason in the GOUT transfer Luke’s blade appears white in the scene on the Millennium Falcon.
Is it possible that some elements from the original in-camera white lightsaber effects (also seen in the 1976 trailer) snuck into the Falcon training scene on the 1990s laserdisc release?
The in-camera effect was just a reflection, like safety vests on construction workers. The outer glow would have been a post-production effect, which the training scene has.