While trying to get to sleep in the living room one night, the red light in our tortoise house came on as it does periodically, and I got to thinking about the red of lightsabers. It seems to me that apart from being culturally associated with evil, a red light in the dark allows one to see without requiring one’s eyes to adjust to the light. This would be a noticeable advantage to a Sith Lord who operates primarily in the shadows. A bright blue blade on the other hand is a blinding light in the darkness. It would please me greatly if the reason for the red lightsaber really came down to such a practical consideration.