Brinsea ecoglow and ducklings question

[loopy12]

Quick question - if you use a brinsea ecoglow, do you put the lowest height setting or the middle one for 1-3 day old ducklings? They are Mallards, but lowest setting still seems like it would be too close to their backs, and certainly touching their heads even if they lie down. Thoughts?

 

[subhanalah]

Maybe put it on some thick bedding so they can have a little warm "den" to crawl into.