Hello you lot, being hopeful for good advice - as above, 2 way switching to double 4' fluorescent. Actually blew fuse when switching off one night. have disconnected cable to light, and when testing choc -bloc (where the incoming cable connects) in actual light with basic multimeter get a reading of about 55ohms between line and earth. Is this the fault?, or would one expect some sort of reading. If not any other worthwhile checks? Both tubes and starters have been removed from light.
Thanks Alec