Madis Kaal wrote:

:If you don't mind running some wire along the runways, why not
:put a photocell next to each bulb so that you can detect
:darkness, daylight and bulb on levels, use 1 PIC for each 8
:lamps and network them to one master PIC that can monitor the
:state of the power for lamps and turn them on and off. Attach

    This will change the old, low-tech local industry of stealing light bulbs
into a vibrant new high-tech enterprise -- stealing photocells.  And with
every eight photocells, an even higher-tech PIC!

-- Mel Evans