If your led lights bars draw a total of 1500 watts then i suggest a 150 amp fuse.
150 watt led light bar amp draw.
Thus a 15 amp.
Our lowest amp draw led light pod has an amp draw of about 1 4 amps.
1500w 12v 125 amps but you should add a bit of a buffer about 20 more so a 150 amp fuse is perfect.
Take an led 120 volt light bulb draws 12 watts.
When dave connects incandescent bulbs to an amp meter they draw up to 1 6 amps but when led lights are used they only pull about 26 amps.
In reality it drew 3 9 a which suggests a load of 49w.
Amp draw is a simple mathematical calculation.
It was labelled as 100w light bar for a nominal 12v supply.
Depends on the size of the led light and the voltage applied.
The difference is significant especially for rvers who do a lot of dry camping.
As a result you could end up overheating the switch melting the wires and reducing.
I calculated current draw at 8 3 amps 100w load.
For example a 100 watt bulb in a 12 volt system will draw 8 3 amps 100w 12v 8 3a.
I got in a head spin with a light bar i bought for the car.
An example is an led 24 volt globe light that pulls 8 watts which draw 0 333333 amps.
For example a 2012 7w bulb with a cree xt e chip can produce more light or lumen output than a 12w bulb with an older cree xp e chip.
Wattage to amperage conversions at 120 volts.
Each cfl or led bulb typically gives the same amount of light as a 60 watt incandescent bulb while drawing 10 watts or less which is equivalent to a current draw of 1 12 amp.
Divide the total number of watts by the system s volts.