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substitution if a fault arises._ Some fittings may also have a capacitor ' "
in the circuit, as shown, but this is not usual in thelow powered
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lamps used in aquaria. Once the aquarist is certain there are no loose
connections, all fault finding in fluorescent systems is most easily
done by substitution with new parts. The advice of a competent
electrician is advisable in complicated
Switches for
fluorescent lighting should be of a higher current rating than those
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used for tungsten lamps of the same power, as the choke produces,
a power surge
at the instant of switching on. F or this reason multiple lighting systems should not be run from a common low current
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