Problems with denoising in rendering I'm starting to take my first steps in Blender. I recently did the BlenderGuru's light bulbs tutorial. I have problems with rendering. The two images attached were rendered using Cycles (Blender 2.79), by CPU, 16x16 tile size and 1000 samples (all other parameters by default). The first image presents an excessive amount of noise (fireflies). 



To mitigate this problem I used denoising (with default parameters), but another problem arose: black areas appear around the brightest reflections in the off bulbs (zoom in image). 



I duplicated the number of samples in both cases with the same reder results.

Anyone knows how to solve this? What am I doing wrong?

Here is the .blend file 

Thank you very much!
Play around with the radius settings for denoise.

On the other hand you can get a very clean render disabling denoise all together and using clamp indirect. 

Here's your scene with no denoise and Clamp indirect 10.0