The last lights I installed had a caution notice printed inside them addressing this very issue - that you need to be wary of harmonics issues.
IMO, there is merit to oversizing the neutral, at least through the first row of lights.
This does complicate your installation technique. The insulation-piercing connectors are designed for use with #12 wires. The same limitation arises with Wagos. Nor am I very happy connecting tiny ballast wires to a #10 with a wire nut.
Another possibility is to run a separate neutral to each set of lights, joining these smaller wires to a #10 at the start of the row. This would allow for the use of 'easier' connectors.
