stan Marsh wrote:
...those robes don't look like the ones the guy putting his hand on artoo was wearing.
I think it is more than lighting, but there is no reason he can't be wearing two different robes. Perhaps the dark one is his alone in hiding robes and the white ones are him returning to the galaxy and the resistance and all cleaned up. I picture end of seven similar to end of empire where they are talking to Lando setting up Hans rescue.
The end of 7 could be Luke communicating via holo to Leia saying that he has begun training Rey and Finn or sending a message meant to go out to all the citizens of the galaxy that he has returned he isn't crazy and evil, "see I'm wearing very non threatening light colored garb"
since it is being taken down around the net it is likely significant.