Stir together corn syrup and sugar. Add pecan halves; stir until pecans are coated. Line a jelly-roll pan with parchment paper; coat parchment paper with cooking spray. Spread pecans in a single layer in prepared pan. Bake at 350° for 15 minutes or until glaze bubbles slowly and thickens, stirring every 3 minutes. Transfer pan to a wire rack. Spread pecans in a single layer, separating individual pecans; cool completely. Cooled pecans should be crisp; if not, bake 5 more minutes.