A relay is a must with any add on light. Stops the h/l switch and wiring burning out due to excessive currant draw.
For WoF's, spotties must have a light beam angle of 0% (0mm drop over 3m). The same as the Hi beam setting.
There's no rule for how to wire them in regarding a separate switch, but it is highly recommended.
So long as the spot lights can be turned off/on from the drivers seated position you are able to wire them in however you like to the main beam (Hi-beam)
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