how many takes did we do? How much extra energy did that use?

Question: how many takes did we do? How much extra energy did that use?
- Keywords:
  filming,
  lectures,
  takes
Asked by to Saiful, Natasha, Karl on 9 Jan 2017. This question was also asked by .
- Saiful Islam answered on 9 Jan 2017:
  
  There were about three re-takes in filming (lasting about one minute each) during the lectures. We didn’t measure how much energy they used – so I’m not exactly sure.

Question: how many takes did we do? How much extra energy did that use?