Hi Poeticas48.
Welcome to the forum and sorry to hear about the loss of your brother.
Being a paranormal investigator, there is a process we go through to determine if something is paranormal or not. This involves ruling out natural explanations first for any phenomena noted. It is not that nobody believes what is claimed by anyone, but in the paranormal field, this is just the way things have to be done to provide credible evidence.
If you rule out all explainable causes, only the unexplainable can exist.
Now, considering the position of the light in the room in relation to the position of the photographer, and looking at the irregular shapes of the object seen (particularly in the second image), we do need to consider that this is simply a lens flare or some other digital anomaly.
I do not want to take anything away from you, or what you believe, but if we are looking for facts and the truth, then we must consider all the possibilities, and I have an issue with the light source in the room in relation to the camera.
I would be interested to hear about anything else you may have witnessed, or "picked up" on, from an activity point of view. This could lend credence to the potential that these are indeed orbs. Have you captured anything similar taking other pictures around the home? Standing in the same positions and under the same lighting conditions, can this image be replicated?
I truly believe in the paranormal - it is the basis behind my own belief system. I have witnessed too many things during my time as a paranormal investigator to say that I do not believe. I really want these to be something that brings you comfort in the knowledge that your brother is in visitation with you. However, as an investigator, for me personally there is a lot of things to look at, and rule out, before stating that these are indeed paranormal