Anyone konws why the power of the spotlight is so big? I’ve seen others use 100or 500 to light the room, but mine always needs to be like 10000, 50000, even bigger, any ideas?
My assumption is that it has to do with the size of your spotlight along with the distance to the subject. Your light radius being over 8m in size with such a large distance to your subject means you would need significantly higher power levels to properly light your subject. Also if you used the constant light checkbox, the spotlight beam will be identical to the power value. If you don’t have that checked, the light output will be clipped by the beam.
Here is a sample of 2 cubes next to each other, one 10x the scale of the other. For the larger object, I had to use a radius 5x in size and 10x the power of the smaller cube and light in order to achieve a similar effect.
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I think you use the spotlight to mimic a ‘sun’ instead of a light so it makes sense it needs a lot of Watt. I would pick a HDR as ‘sun’ since that (depending on the HDRI) also gives a bit of natural atmosphere/color. Than for the indoor part you can use spotlights if needed but with those windows I would say an HDR with enough GI bounces will lit the interior quite well.
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