A streetlight gets to be very sketcky at times.
Here is what may be your secret...
When you control a streetlight with a player, that light has to be switched on or off when the mission begins, otherwise your setup will not work at all or be very unreliable.
I myself don't reccomend the streetlight addon.
8)And I do think streetlights are fun, you have to play around with them so you can learn how they work.