Do pill bugs prefer a light or dark environment?

[Answer 1] I'm trying to determine that exact thing with pill bugs. There may be some errors in my experiment, but so far they have preferred light over darkness. Although that's without soil so if theres soil results may differ. ----------------------------------------------------------------- [Answer 2] I also did this experiment in my IB Biology class (and also without soil), except my results leaned more towards darkness. Of course, there were multiple possible errors in my experiment so I can't refute the counterargument above completely, but prefering darkness seems to make more sense logically...