A Slow Moving Vehicle (SMV) emblem is required at all times.
Additionally, the Ohio Revised Code requires tractors (non
multi-wheeled) and other self-propelled equipment to display the
following lighting sunset to sunrise or when there is insufficient light
to render discernible persons, vehicles, and substantial objects at a
distance of 1000 feet ahead.
One white headlight on the front of the vehicle, visible from at
least 1,000 feet in front of the vehicle.
Two red lamps as wide apart as possible on the rear of the vehicle,
visible from at least 1,000 feet behind the vehicle or one light and two
red reflectors.