I've using green for a while now and I doubt the deer spook at it because I've had them in a field in the dark as I was coming out and they didn't spook,, I think they are mesmerized with any dancing light in the field sometimes .. .
when I know there are deer around I just walk at a steady pace in a direct line to my truck and don't stop for nothing and I know for a fact deer have stood there a different distances away and let me just walk by,,,,,, I'm sure a lot of you other hunters have been in your stand and you actually watched another hunter walk past a deer that he didn't even know was there but you did.
this might be because its urban deer that see all kinds of people all year long so I believe in heavily used area some deer can read body language and they can identify someone as a threat by how they are acting in the woods,, while stumping shooting 2 yrs ago with a white T shirt and shorts a decent sized doe let me stalk up to about 20yds and she had to know I was there.
back to lights,,,, try the one I linked above for less than 20 bucks it cannot be beat for what we do..