It’s been in in the kitchen for a few days, with flies zooming around in front of it, like Spitfires in a dog fight, and the last two days in the front room.
It’s killed 1 small moth so far. Not a single fly. Utterly useless.
Part of the problem is house flies are not as attracted to light as moths. They are more attracted to smells.
Put out some food with a strong smell and block the path to it with the fly killer. Might catch more flies thar way.