Awakening Flowers (2012)

Scattered around where Rua sits, these flowers light up gradually and grow brighter as she becomes more aroused. Then they die down as she recalls her mother. Possibly also they light up to show her path as she walks away.
Because there will be so many of these flowers, that their construction should be quite simple. they could look a futuristic or they could look as real or neutral as possible, so that they don’t draw attention to themselves until they start lighting up.
While rua’s cape needs to be triggered by her, these flowers can be triggered by a set technician.
The pulsing behavior could relate to the background soundtrack for this scene.

Piranha RGB LED with in wire coil with polyester stuffing as diffuser:

Single Red LED:

Photos of scene: