My barn was built less than 2 years ago. It does not have lightning rods. The builder felt that they weren't needed, and the other three main barn builders around here also gave me the same "not worth it" advice. I've since done a lot of reading on line, but a lot of the advice seems to be based on fear rather than real evidence. Mostly things like "a big barn near me burned and horses were killed, so every barn should have lightning rods." These reports seldom say whether the burned barn had lightning rods or not.
My barn has woods on two sides of it, with trees much taller than the barn itself. My fencing is all wood, so no surrounding wire fencing to conduct electricity. My utility lines are all underground. The nearest fire station is approximately 2 miles away. I do not store hay in the barn.
I would appreciate advice, pro vs con, particularly from those here with barns, and those with electrical backgounds. Thanks.