Do you even have a thermostat? I don't see one.You can get one for a hot water heater for less than $10 at HD or Lowe's. You need to wire the thermostat into the light fixture. I've never heard of someone ajusting the height of the light in an incubator. LOL I guess anything could work.
Here's the page for instructions for DIY incubators. https://www.backyardchickens.com/a/homemade-chicken-egg-incubator-designs-pictures
You also didn't mention how you're going to deal with humidity at lockdown. It you are raising the glass, it's going to be really hard to raise humidity so they can hatch and not die in their shells.
Here's the page for instructions for DIY incubators. https://www.backyardchickens.com/a/homemade-chicken-egg-incubator-designs-pictures
You also didn't mention how you're going to deal with humidity at lockdown. It you are raising the glass, it's going to be really hard to raise humidity so they can hatch and not die in their shells.