I am trying to override a standard "New" button that appears when Case tab is clicked ,so i navigated to new button on the object and i see lightning component bundle is one way to override but when i select the dropdown i dont see my lightning components , is this Beta? or do my lightning component need to implement something ? or below answer in the link is what needs to be implemented for now lightning comp in VF?
How can I override standard buttons with a custom Lightning page? standard-buttons-with-a-custom-lightning-page