I have left them on 24/7 in a clamp light holder and have had no problem. The aluminum globe will get warm but not hot.
Thank you for the question. This lamp does not give off UV light.
No, this bulb is not Teflon coated.
Thank you for the question. Here is a link to the newest model of that bulb. https://www.homedepot.com/p/Feit-Electric-125-Watt-Clear-BR40-Dimmable-Incandescent-120-Volt-Infrared-Heat-Lamp-Light-Bulb-1-Bulb-125R40-1-HDRP/312502108