Based on the information provided, Alisa's reaction to the porch light attracting frogs, which makes her feel like she cannot breathe, suggests that she may be experiencing a specific phobia. A specific phobia is characterized by an intense fear or anxiety about a specific object or situation—in this case, frogs—leading to avoidance behavior (not coming home after dark when the light is on).
Therefore, the most appropriate diagnosis for Alisa would be a specific phobia.