Lightning is a bright flash of static electricity produced by a thunderstorm, forming when negative charges in clouds build up and are attracted to positive charges in other clouds or the ground. The LIP instrument measures lightning using a skilled operator. Lightning forms by the build up of negative charges in clouds attracted to positive charges elsewhere.

2. Lightning is a
bright flash of
static electricity
produced by a
thunderstorm.

3. The LIP instrument
measures lightning and
they use a skilled operator.

4.  Lightning forms by the build
up of electrons or negative
charges in clouds that are
attracted to positive charges
in other clouds or on the
ground.