Butter one side of all the bread. On the unbuttered sides of 2 slices place cheese, bacon, avocado, and tomato. Combine light mayonnaise and honey. Spread on unbuttered side of remaining 2 bread slices. Place mayonnaise side down on top of tomatoes.
In skillet or griddle, cook over medium heat 4 to 6 minutes, until toasted and cheese is melted, turning once. Or place in preheated panini maker; cook 2 to 3 minutes. Makes 2 sandwiches.