+1 to what was said above, but it can also depend on other things; such as the strain of yeast, did you dry hop, how long of a cold crash, etc. I can get Lutra or a traditional lager yeast-fermented beer (no dry hop) clear in two-three days, same with Nottingham (my go-to ale yeast), using gelatin. However, I've recently started using the new Lallemand Novalager, and that yeast takes at least 4-5 days to be what I would call 'clear'. First one is now eight days in the keg and is fairly clear, but not what I would call bright. Don't care, it tastes phenomenal.