The Gardner WS85 Wall Sconce Fly Light should be mounted at 5-6' up as this close to the ideal area flies travel in for best results. A fly's nature is to be below five feet high or even closer to the floor, so this 5-6 feet would be give better results than anything higher.
Each Gardner WS85 Wall Sconce Fly Light comes with 1 glueboard and 1 light bulb to get you started. You will need to purchase replacement glueboards and bulbs separately.
Yes, the Gardner WS85 Wall Sconce Fly Light does come with all of the necessary mounting hardware.
We would recommend contacting the manufacturer directly for a replacement ballast for the Gardner WS85 Wall Sconce Fly Light. Gardner can be reached at 888-558-1900.
The glue board for the Garner WS85 Wall Sconce Fly Light slides right inside the inner wall of the unit to catch flies as they come towards the light.