[Guest]

dude, depending on the map, searchlights will only activate at night , after 7:30-8:00, and you must check that for example, if the searchlights are Red (team), they will only be activated if an enemy (Blue) plane comes within a certain distance - i'm not sure offhand, i think the distance is about 8km, and vise versa. The sirens work in a similar fashion - activated at a certain distance, only if an ENEMY plane is near.
The only difference is that the siren will work day and night.
Hope that helps.