EXTERNPROTO bulb [
  eventIn MFString message 
  exposedField MFString string 
  exposedField SFVec3f translation 
  exposedField SFRotation rotation 
  exposedField SFVec3f scale 
  exposedField SFInt32 type 
  exposedField SFColor color 
  exposedField SFColor text 
  exposedField SFFloat transparency 
  exposedField SFVec3f text_scale 
  exposedField SFVec3f text_translation 
  exposedField SFRotation text_rotation 
  exposedField MFString background 
  eventOut MFString message_changed
  ][ "@vr-proto-bulb.wrl#bulb" ]