I am building a hatching box for bee queens. In it, i need to be able to hold a stable temperature of 37 degrees celsius (98.6 F). Typically, i'd have an ESP32 with a temperature sensor and generate the heat with an old fashioned light bulb, controlled with a relay.
However, modern light bulbs generate little heat and the old ones aren't easy to find. I was thinking there might be a different way to generate the heat i need. Does anyone have any tips for how this might be done, safely of course, using mains electricity?