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You could use a simple N-channel mosfet for driving each lamp. No need fo=
r
zener or transistor this way. Gate is connected to PIC (maybe through a
470ohm resistor), Source is to ground, and lamp is between +12V and the
Drain.=0D
=0D
Note that few mosfets contain a protection diode that will directly
polarised when the supply is inverted, so all the lamps will be lit. If t=
his
isn't acceptable, use a diode in series with each lamp.=0D
=0D
Pay attention not to forget the reversal protection for the 5V supply of =
the
PIC.=0D
=0D
Lucas Hartmann.

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