I am purchasing my bathroom vanity lights this week. For my boy's bathroom, they have 2 vanities back to back from one another. The vanity is 54 inches long. The light fixture I purchased is a 4 light bar, measuring 28 inches across. Is this a good size for that space?

In comparison to what we ave in our current home, a 36" vanity with a 24" light fixture. I know it will be enough light just don't want it to look out of proportion. The mirror will extend completely over the vanity and the light will go right above the mirror. I think anything bigger will be overwhelming and too much light.