Replace any standard lights with yellow light bulbs in all outdoor places. Moths seek the brightest light around. This leads them to white light rather than the yellow.
Cover outdoor lighting areas with citronella oil during the day. Don't get citronella on the bulb itself, or it could explode when turned on.
Place citronella candles or torches around patio or porch area.
Fill a dinner plate with water and dishwashing liquid. Set the plate on a bucket or other surface directly under the one outdoor light. The water will increase the brightness of the light and therefore will attract most of the moths to the liquid on the plate. After landing on the plate, the moth will become coated in the soapy liquid and drown.