Will the high humidity levels of my garden affect the ozone output?

No. Ultraviolet bulbs could be immersed in water (do not try this at home) and continue to produce ozone. Ultraviolet lamps are used extensively to purify the water in pools, spas, ponds and bottled drinking water. Humidity is a factor in producing ozone, but high humidity actually helps the BIG BLUE produce more ozone. Almost 50% more ozone is produced at 85% RH than it is at 50% RH. Competing ozone technologies are hampered by high humidity levels. Corona Discharge ozonators use an exposed electrical arc to produce ozone. It’s kind of like putting your toaster in the bathtub and expecting it to continue to brown your bread.