I don't think this is kosher. Code probably says it has to be a certain height above grade. Probably at LEAST a foot so that snow, or leaves, or whatever else doesn't block it. You can just disguise it! Put a wishing well over it, plant a bush or several bushes around it, pait it with a camoflage pattern, hang a lantern on it and call it a light pole, get creative but don't hurt your system by removing it or making it too low.