a. The static display time for each message is a minimum of six seconds.
b. The time to complete change from one message to the next is a maximum of two seconds.
c. The change of message shall occur simultaneously for the entire sign face.
d. The sign shall contain a default design that will freeze the device in one position if a malfunction occurs.
e. The sign shall have no revolving, flashing, moving, rotating, or similar intermittent lights.
f. Electronic signs shall not exceed a maximum illumination of 5000 nits (candelas per square meter) during daylight hours and a maximum illumination of 500 nits (candelas per square meter) between dusk to dawn as measured from the signís face at maximum brightness.
g. Electronic signs shall have an automatic dimmer control to produce a distinct illumination change from a higher illumination level to a lower level meeting the above illumination standards for the time period between one half-hour before sunset and one half-hour after sunrise.