Good information, thanks.Your multimeter is probably only capable of a maximum of 10 amps DC, and is probably fused at 11 amps. You could measure the amp draw of each component individually, if you're careful, and add them up. If you want an exact number for the entire bar at once, look for a clamp style ammeter that's capable of 100 amps DC or better.
No power supply. I guess I'm coming off the battery, to my control head and then to the light bar, using a breaker for the main leads. I think that is the way to do it. If there is a better way I'm all ears.Keep in mind the amp draw will be different between 12 and 14volts. If you are using a power supply, many are not designed to be run at peak amps for very long. IIRC in general 80% capacity is a good rule.