Have a read of ADR 21/00 instrument panel. If you plan to use a toggle switch then there are requirement around dimension in that ADR. I cant find where illumination is specified.
http://www.comlaw.gov.au/comlaw/Legislation/LegislativeInstrumentCompilation1.nsf/0/B199168C57EB800ECA25742D001E3B44/$file/ADR2100comp1FINAL.pdf
This is the electical connection requirements from ADR19/02:
Quote:
Electrical connections
The signal shall be given by means of a separate control enabling all the
direction- indicators to be supplied with current simultaneously.
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