This is something unusual but interesting !!!
You pull the insects, all types that fly at night, to any place that you wanted inside or outside your BH.
The developer named it as insect "SuperLure", pattern right pending.
While busy with my running around I was introduced to this new idea of luring insect to a specific location using a kind of liquid.
What he told me was to plant a reasonably tall trees, about 10-20 feet tall, around your stand alone BH. Try to be about 5-10 meters away to be used as the medium to pull those insects.
You can than install those water spray system all around the trees and put a pump with auto spray operation. Spray the SuperLure at night and let the nigh insect be attracted to the smell.
These insect will be drawn to the liquid and will stay for a long time.
During the day when there are some wind breeze they will be blown out of the leaves and will attract your possible tenants.
The other way is to place the liquid inside a container and insert a sponge to pull the liquid to the air. The sponge will bull the liquid via capillary action and will be exposed to the air.
Once those insect smell the aroma generated they will crowd onto the sponge.
This will create more insect around or closed to your BH.
I have yet to try this "SuperLure" and I think this is a very interesting idea or invention that might be useful to our BH(s).
Those who wanted to try ply place your order and I will advise the cost once you have indicated your interest.
I need to negotiate with the supplier its cost.
Drop a line at firstname.lastname@example.org.