Sure, you could just adjust the color in post and not do any
lighting at all. You can shoot this in anyway you think is best.
To get the very best result you should use the 1k as your
source (the moonlight) gel it with blue and use the other lights
as fill also using blue gels.
I've done two 48 hour projects - both were shot at night and we
used lights for a better look even though it took longer than not
using any lighting at all. Is this your first 48 hour? You're going to
have a blast! Make sure to post it, okay?