We have power failure all the time. Getting a generator installed eventually... but I forgot about it and sat eggs anyways.
But when I tried using incandescent bulbs during brooder transition to no heat from the 250 watt bulb.... they kept burning out rapidly like they weren't meant to be on 24 hours a day or something.
How cool that you got it to work with even just a 40 watt bulb.
Since this is my first time... I am not marking air sacs or weighing.... Just trying t keep it simple with temp and humidity and see what happens. A practice run to get familiar with the process. I have to say, it's hard to remember which side I started from in the morning and how many times have I already turned them today. And one time I got half way through turning and distracted by my daughter almost couldn't figure out which way I was currently turning them!
And I realized just now the reason it's OK to use styrofoam is because the chicks won't be in the bator long enough to discover how much they LOVE eating styrofoam.