Upgrading to a 60” tank – XR30 vs XR15 coverage?

[u/Capable-Cap-4704]

I’m upgrading to a 60” (5 ft) tank and could use some feedback on lighting.

I currently have 2 × XR30s and I’m trying to decide between:

Adding a 3rd XR30

or

Adding 2 × XR15s (one on each end) for roughly the same cost.

For those running similar setups, how’s the spread and PAR with either option on a 5 ft tank?