8. Cause the bulb to shatter. The pieces will be found at the bottom.
9. If an incandescent bulb, use a DC current and a compass needle to detect magnetic fields.
10. If fluorescent or LED, look for RF interference.
11. If incandescent, use low frequency AC. Listen for the mechanical vibrations at 2x the AC frequency as the filament expands and contracts with instantaneous power.
17. If the box is wood or cardboard, bring in termites - they should eat the box letting you see where the bulb is.
18. Let the box corrode, erode chemically, mechanically - you should then see where the bulb is
19. Poke fine rods through the box - obstruction, you are hitting some part of the bulb.
20. Place moths with accurate and precise GPS - record their movement and one can determine where the bulb is.
Magnetic resonance 3D imaging. That tells not only where cancerous masses are but their shape/ size and where tiny gold implanted reference spheres (markers for daily localized radiation treatments extending over weeks, to not do too much damage to normal tissue) are.
Modern MRI machines used with accurately shaped beams from linear accelerators. The cross section shape of beam changes with beam approach angle to be same as the cross section area of the target "seen" from the current beam angle.
Make separately large thermal gradients across the box (one for each direction thru box) and with no power applied, measure the resistance between the wires. This assumes lamp is a tungsten filament type. The resistance hot, is almost twice that when cold. (Why those lamps often burn out at first turn on - large initial current surge.)