Update app/main.py

app/main.py

@@ -1155,7 +1155,7 @@ class HVACCalculator:
                 'lights': {
                     'power': sum(load['power'] for load in internal_loads.get('lighting', [])),
                     'use_factor': internal_loads.get('lighting', [{}])[0].get('usage_factor', 0.8),
-                    'hours_operation': internal_loads.get('lighting', [{}])[0].get('hours_in_operation』, '8h'),
+                    'hours_operation': internal_loads.get('lighting', [{}])[0].get('hours_in_operation', '8h'),
                     'zone_type': internal_loads.get('lighting', [{}])[0].get('zone_type', 'A')
                 },
                 'equipment': {