Box for luminaire and method for installing luminaire

A box (1) containing an uninstalled, built-in luminaire (10) with unconnected wiring that is configured to be electrically and mechanically installed in an installation opening in a ceiling, comprising:

• a box body (2) delimiting a space (3) receiving and supporting said uninstalled, built-in luminaire (10) with unconnected wiring within the box body (2);
• an opening (4) delimited by a circumferential edge (5) of the box body (2) for putting the luminaire (10) into and taking the luminaire (10) out of the box (1),
• a flap (9) for selectively closing and exposing the opening (4) of the box, the flap (9) being provided at and extending from the circumferential edge (5) of the box body (2) delimiting the opening (4);
• and
• a tap (6) for temporarily hanging-up the box (1) carrying the luminaire (10) below the installation opening in the ceiling in an angled manner, the tap (6) and the flap (9) being integrally formed with each other and the flap forming part of the tap, said tap being configured to carry the weight of the box and the luminaire, the tap comprising
• a connection portion (7) extending from the box body (2) having a proximal end (70) and a distal end (71), wherein the flap (9) forms at least a part of the proximal end (70), and
• a hanger portion (8) at the distal end of the connection portion (7) with respect to the box body (2) and laterally extending from the connection portion (7), wherein said hanger portion has an unfolded state and a folded state and is collapsibly and hingedly connected to the distal end of connection portion (7) such that it can be collapsed into a folded state to reduce the lateral extension of the distal end of the tap;
• wherein said tap extends upward from the box when the box is opened and before the box is opened the flap covers the opening in the box and the hanger portion is in an unfolded state, and further wherein the hanger portion is adapted to be collapsed into the folded state to insert the hanger portion into the installation opening in the ceiling and then expanded again to an unfolded state in order to temporarily hang-up the box carrying the luminaire from the installation opening.