Answer:
Followspot.
Explanation:
This fixture is optically identical to an ellipsoidal spotlight but is rarely equipped with shutters. It can be zoomed from wide to narrow and usually has an iris, as well, which can further change the size of the beam.
It is used with an operator in real time to aim at and follow a performer on stage.
Answer: There's no long-distance energy transfer. This looks almost like a plain old transformer (yet with an air core) and I've never heard of a 7 kilowatt transformer wasting as much as 14 percent energy in conversion - dissipating about one kilowatt of power would just melt the transformer. How realistic is the "86% efficiency" claim?
Explanation:
