I have a cellar light which is presently supplied by a spur coming off a junction box. To fit an additional fluorescent light nearby (to operate off the existing switch), do I a) run a new cable from the j.b. to the new light, b) run it via a new j.b. cut into the existing feed cable (i.e. a spur off a spur), or run a new cable as an extension off the existing light (i.e. extend the spur). In terms of cable length and convenience it doesn't matter as they're both close together. Any help appreciated.
