Switch start is the control gear that has been used by the industry for many years. The current is limited by a wire wound magnetic choke or ballast. The choke, which is a coil of wire makes the circuit inductive. The advantage of switch start is that parts can easily be replaced rather than the whole unit.
High Frequency electronic control gear is a single ballast that performs all the functions of the different components in the standard switch start circuit. HF ballasts produce a frequency between 25-40 kHz, this higher than standard Switch Start and results in improved light and eliminates lamp flicker that can be seen in them.
Created by Steve Ellwood on 28th July, 2015
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