Red light is best it will let the ducklings rest white isn't the best It would be like us trying to sleep with a bright light in our eyes. Make sure to keep watch on the temps 85 first week then 5* cooler each week there after.
CR is right watch how they are reacting to temps in the aquarium make sure one end is warmer than the other so if they want they can get away from the heat.
CR is right watch how they are reacting to temps in the aquarium make sure one end is warmer than the other so if they want they can get away from the heat.