With the electric-bulb
tester you cannot
only verify whether a
bulb is still in working
order, but, if so, also
find its wattage. True,
this power rating is
normally stated on
the bulb, but it happens
frequently that,
after a time, this is no
langer legible. The
tester indicates
whether the bulb in
question is rated at
15, 25, 40, 60, 75 or
100 watt. Now, isn't
that handy?
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