Generally, you'd divide the wattage by the voltage of the
lights, and round up to the nearest integer.
In the US, (where you probably aren't, since you're talking
about fused plugs) a typical set up is two 75 watt floods,
at 110V, so 2 amps.
I am in UK. There may be 2 amp fuses but I haven't heard of them in common
use. Think it must be different over here. The plugs are 13 amp and
sometimes they have a 5 amp fuse and sometimes a 13 amp. Thanks for your
reply though I think I might have to look in the uk groups???
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