Lightbringers are only encountered once, at which time Samus does not possess any weapons to affect them, either negatively or positively. However, it is suggested in their scan data that they would have been destroyed by the Annihilator Beam as well as energized by the Light Beam. If their morphology mirrors that of typical Light Crystals, it is also possible that their energy field could have been de-energized by the Dark Beam.
As these artificial creatures are harmless and beneficial to Samus, it is unnecessary to terminate them. It is advised to observe and follow their movement patterns in order to minimize damage taken from Dark Aether’s atmosphere.