I have been in the ceiling and under the floor and notice that insulation is missing in both.

I will need to purchase a battery work light so that I can turn off the power before working in the ceiling. I have been looking at:

Any comments or a better suggestion? I expect to only use it for the work outlined above i.e. not be used after that.

Regarding the under floor insulation - it is currently suspended by something similar to fishing line. The existing batts are a PITA - great tufts fall out if not very careful.

Given that the current support lines are about 30 - 40cm apart:
1. what is the best method to install the new batts, and
2. given the above what would be the best type of batt?