At many rinks, the goal lights are tied into the clock.
All NHL rinks for example have this feature, and many
college rinks do as well. However, there are certainly
rinks that do not have this feature. Although I haven't
done a study of ECAC Div I rinks, I would be very suprised
if all had clock/goal-light links, and I am positive that
there are several Div 3 schools that do not have this set
up.