Nice one TC.
I for one wasn't aware that lamps were effective 'bird scarers'. Judging by the amount of activity at this time of year, perhaps it's something that warrants more consideration.
A quick
google search came up with;
"COLLISION WITH AIRBORNE OBJECT - although it is not always possible to avoid a birdstrike, balloon/kite strike, etc., training techniques in-flight and in a simulator can teach the pilot how to react when a collision is imminent to avoid a catastrophic accident. The U .S. Navy has demonstrated that simply turning on a landing light when a high concentration of birds is encountered will greatly reduce the chances of a bird strike. Many other techniques can be employed and must be taught to new pilots. "
Like you say, a burnt out bulb is better than a replacement screen.
SS