Stack! Studios // www.stack-studios.com
It is generally a good idea to always use realistic emitter intensities for your emitters. Easiest way is using the emitter presets such as the incandescent 60W light bulb preset. If you feel the emitters in your scene don't emit enough light to properly expose the render, it is tempting to raise the emitter intensity unrealistically to compensate, but very high emitter intensities may result in more noise and "spots". Instead you should change the camera settings that affect exposure (f-Stop, Shutter Speed, ISO).
...
As a general rule, to have a properly exposed typical indoor render lit only with artificial light the camera settings would be: f-Stop 2.8, Shutter Speed 1/10th 30th of a second, ISO 400.
...
...
| width | 35% |
|---|
...