Lydia Ko's turned on the sizzle to be in a commanding position after the second round of the LPGA's season ending championship in Florida.

The world number one has shot a course record 62 to be 12 under for the tournament and three clear at the halfway point.

Ko spent a late night on the range with her coach after the first round tweaking things.

"Going into today I just wanted to focus on my game and I knew I had a great pairing.... and maybe it was the great vibes I got from them but obviously it's a great round and I'm in a better position than I ever could have imagined," said KO. "Over the weekend I just have to focus on me."

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Tim Wilkinson and Steven Alker have both dropped down the leaderboard in their second rounds at the PGA Tour in Georgia.

WIlkinson is eight under for the tournament in a tie for 26th and Alker a shot back.