1008.1 Doors. Means of egress doors shall meet the requirements
of this section. Doors serving a means of egress system
shall meet the requirements of this section and Section 1020.2.
Doors provided for egress purposes in numbers greater than
required by this code shall meet the requirements of this section.
Means of egress doors shall be readily distinguishable from
the adjacent construction and finishes such that the doors are
easily recognizable as doors. Mirrors or similar reflecting
materials shall not be used on means of egress doors. Means of
egress doors shall not be concealed by curtains, drapes, decorations
or similar materials.
Signs and lights don't count for anything. It's all about the door and only the door. This is a concealed door and a code violation.