Non-illuminated signs are often made out of metal or high density sign foam. Unlike illuminated signs, these signs require external lighting in order to be visible at night. The two most common methods of external illumination are downlit (lit from above) and uplit (lit from below). A third option for this type of signage would be backlit. However, a number of businesses also use this signage without any lighting. Metal signs can be used for main building signage, blade signs that protrude off the sides of buildings, or hanging signs. They can also label different parts of a location or as directional signs; i.e. ‘Entrance’, ‘Garage Bay 1’, ‘Deliveries’. This type of signage can also be routed to a custom shape or even have routed or carved letters and logos.