Rantontoo,

Each manufacturer should list this information for their product. It is usually in the specifications for the lights. I am just using Contrast lighting as an example. They listed it as Specification on the particular fixture.

Light spread information: See page 5 and the table named light cone describes how the light spreads at different heights based on the fixture.

Something similar should be available for your lighting manufacturer.

Good luck!

This is pretty simple ...I can't imagine why none of tools were investigated ...try this one ...https://www.pegasuslighting.com/lc-buying-guides/infographic-a-guide-to-beam-spread.html ...