Teeth and equipment can be replaced, goals are forever!. -- hockey proverb
Maybe we take it for granted that the Lightning have had a pretty potent offense for much of their existence... Oh, sure, there were have been more than a few lean years and the Bolts have lacked consistent goal scorers (evidence of this is Steven Stamkos is 3rd all-time on the team in goals-scored... after four seasons in the NHL), but lack of offense hasn't been cited as a major concern for the Lightning in a while.
Take a long moment to think about this one... If you wanted to define the Lightning with one goal, one lighting fo the lamp that you'd want to represent the Bolts... What goal would that be?
The weight of the goal (importance) might be the factor for you, or perhaps the performance that led to the goal... But which goal is the most definitive for you?.