When attempting to lure an iguana out of a tree with a spotlight, should I spotlight the tree or the ground?

Yesterday (5/25/07) at about 12:00 in the afternoon, my 1 1/2 year old iguana decided to scale a 100+ feet tall pine tree in the back yard. I can't see him, but I can hear him moving around up there. I've tried placing a bowl of water and his favorite food at the base of the tree and in the "general area" around the base of the tree. I sure as hell cannot climb this thing, or cut it down. My friend told how he'd gotten his bearded dragon out of a tree by using a spotlight at night to attract it. I'm attempting to do this with my iguana. Trouble is, I'm not sure whether to spotlight the ground (So he'll goes towards that) or the tree (So he'll climb further down the trunk and stay in one place).