Pre-scenting is very effective... I've fed in the day time with no problems, I'm not implying that one works better than the other, I just choose to feed at night.
As for the light, to the best of my knowledge they spend the daylight hours in borrows, etc... coming out after dark to feed. I believe they "know" when it's dark... like they "know" the seasons are changing...
Maybe someone else will chime with more info?

Quote Originally Posted by mwedgley View Post
Agreed but if you pre-scent wouldn't that wake them up anyways. I don't think that in the wild they only eat when a rat or mouse crosses by them at night. Plus if you keep them in a rack they aren't getting much light in from outside so I don't know how that would make much of a difference.