Curiousity time. The following are a slew of unorganized questions
that can most likely be answered with one good source. Please feel
free to answer them in any order/style/etc.

To what extent are volunteer firefighters/EMT's/etc. allowed to use
emergency lights on their personal vehicals to get to a scene in the
state of PA? What lights may they use? What lights are illegal? What
other apperatus may they affix to their vehical (e.g. sirens, traffic
light changers)? What are their rights while lights are flashing?

If you find any other intresting information while researching this,
please attach that as well.

Thanks!

Trying looking at:

http://www.pacode.com/secure/data/067/chapter173/chap173toc.html

I can see the following two quotes at that source:

"volunteer firefighters may each equip one personal vehicle with no
more than two flashing or revolving blue lights or one light-bar
assembly containing no more than two blue lights. Only blue lights may
be used on the light-bar assembly."

"The privately-owned vehicles of a police chief, assistant police
chief, fire police captain and fire police lieutenant shall be
equipped under paragraph (2)."