The only paper I can think of that has looked at radius directly is this one by @eleslade.bsky.social - finding that moths are attracted to weaker traps from a surprisingly small area! resjournals.onlinelibrary.wiley.com/doi/10.1111/...
Macro‐moth families differ in their attraction to light: implications for light‐trap monitoring programmes
Light traps are used to make inferences about local macro-moth communities, but very little is known about the efficiency with which they attract moths from varying distances, and how this may dif...
resjournals.onlinelibrary.wiley.com