Question

what range of sizes is fixture wire available in?
#4 awg to #1 awg
#8 awg to #4 awg
#12 awg to #6 awg
#18 awg to #10 awg

Explanation:

Fixture wire is commonly available in the range of #8 AWG to #4 AWG based on industry - standard wire sizing for such applications.

Answer:

#8 AWG to #4 AWG