In The LEGO Batman Movie, an important of Batman’s indulgent Batsuit rack is an ostentatious, pulsating backlight that swings up behind the suits as they arrive in front of the runway. It allows Batman to have the dress-up party he deserves, if not the one he needs. This build re-creates that element.
This is constructed of fairly common parts. The lights can be changed to whatever colour you have available, or even to a mix of colours.
This can then be hung from whatever interior structure you build in the middle of your suit rack to provide support.
Check out the Batsuit build project so far here.