LED driving lights wiring

Hi Twinkles you are saying you have 120+90+90=300w

Thats a lot of LED power , rule of thumb is no more than 7 amp (84 w @ 12V) per 1 mm sq cross section area of wire. I.E. Minimum of 4mm sq copper in your wire.

I'd reccomend 6mm sq though.

I would recommend wiring the Bar & spots seperately as you have a combined load of 25A (300/12=25)

Lightbar 120W / 12 = 10A - 8B&S/AWG
Spots 90W x 2 180W / 12 = 15A - 7B&S/AWG

I would also use 2 relays and remember to fuse each line from the Battery with say a 15A & 20A respectively

cheers

The first question should be where are they mounted...that will determine how long the cabling run is....without this information no sensible recommendation of cable size can be made.

Yes I would run them on two seperate circuits,switched by seperate relays and controlled by seperate switches.

BUT we need to know how long the cable runs are.

cheers