I want to render 2 object, in the rendered preview it looks fine

butwhen I press F12 the result is only a black screen like this

I have switched the little camera icon in the left on, btw I deliberately switch off camera in object 'Plane' that I don't want to render,
If you want to help me please download this blender file, thanks http://pasteall.org/blend/index.php?id=50853