Question regarding how future lighting works

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#1

When making indoor lightings, my brain suddenly asked me a question

Which would create more stress for renering:

  1. A large area of single surface light instance.
  2. A combination of spotlights.

And then this leads me to another question: Is the performance affected more by the area of lighting objects, or the number of light instances.

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#2

This would be more harmful to performance.

#3

Size of something never really affect performance because the computer after all only rendering and calculation one instance. If you have multiple instances then the computer needs to double, triple, quadruple, the work in order to render the correct things.

#4

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