Driving Light Wiring

[VK2FMIA]

Hi again all,
I'd like to hook up 3 Narva Ultima 175's to the same switch. Before I splash my cash, I want to know if it can be done and how tedious it would be to do.
A clean wiring diagram or general help would be much appreciated from anyone who knows anything about this.
Cheers guys.

Should not be a problem hooking up 3 lights to the same relay as long as the relay & wiring can handle the amps. Would suggest a 40 amp relay & 15 amp wiring to each light from the relay. Each light will draw around 8.3 amps (watts(100) divided by volts(12) = amps). The wire from the relay to the switch does not have to be as heavy as it only supplies switching power to the relay.

You would need at least a 30 amp wire & fuse from the battery to the relay as the lights would be drawing 25 amps in total.