I saw your ISO was 2000 ... big deal , was the result grainy? if it was , then it should be a concern. It doesnt look bad on here , so what should be more of a concern is whether your subject is in focus, as for any photo, you use enough ISO for you to be exposing to the right of the histogram. You will still have grainy shots at ISO 100 if you expose on the left of the histogram.Sure , Your artificial-supplemental lighting will affect the photo, but it can be problematic in and of itself , and one can wait a few hundred shots before approaching that issue IMO.