Time lapses can be tricky to capture. Even when you control all the lighting and environment, as I did here in my studio, you can still get annoying flicker. This can be caused by micro changes in lighting and kelvin temperature as well as shutter inconsistencies. See the below video for the “out of the camera” (mostly) results.
However, there is software GB Deflicker that averages the frames out the luminance and inconsistencies. I was fortunate enough to try a Beta 3 release from Granite Bay Software.
As you can see the results are spot on. I highly recommend this software to anyone who is dabbling in time lapse.