I par boil mine first for 5 - 10 mins, then spray a small tray with frylight, add the chips, spray them and grind some salt. Then I pretty much chuck them in the halogen on full for 10 mins, turn them and then anpther 10 mins.
They turn out ok but I only make them in the halogen if it's just for me. When I'm cooking them for husband, they go in the normal oven.