Birdwatch Ireland is voicing its concerns about an event scheduled to take place at Punchestown Racecourse.
The Lights Fest, which has been held in many other countries, is to take place there on August 18th.
Organisers say they have "created biodegradable lanterns with a limited burn time and flame retardant."
They add they have a "a dedicated cleanup crew, waiting in the landing zone, whose focus is collecting lanterns after the event"
Birdwatch Ireland's Oonagh Duggan has been speaking to Kildare Today