just a thought.. u can chrome them like u did ur plenum color.. or u can paint them to match the car.. they are parking lights and they are NEVER used really.. i blacked mine out and it looks stock.. u can paint over urs the stock color of the car.. that would be more custom and u might be able to get done ASAP.. or u can put LEDs there do go with ur lighting display.. u can pretty much use that for anything.. think about that before u go ahead and put a clear turning signal and take the quick way out..
i would also try and get rid as much of the "black on ur car" as possible and match it with ur colors.. red, chrome, or interior colors.. like the headlamp bezels or the inner part of the grill.. looks like u got the McClaren grill? i like it.. but once u go show it's the little things that really make ur car stand out..
hope u get all those things done for ur LS for this show season.. best of luck..