You could easily use 14-16 AWG at that distance for the Qs8.

http://www.roger-russell.com/wire/wire.htm#wiretable


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85