Canada does not allow horticontrol flips because the neutral is not switched, instead all three neutrals are wirenutted together, and since the ballast is 240V, the neutral from the 240V power is spliced to the two neutral wires from the lampcords. There is a specific section of CEC that states that is not permitted, I posted it another thread, I will find and repost if neccesary. The hot and neutral must be switched.