If you get its temperature up to 400 or 500 degrees F, it will glow a dull red. In these appliances electricity heats a coil or wire hot enough to make it glow. That's the temperature of a normal light bulb filament. When something produces light because of heat, it is said to be incandescent . Anything that you heat up will glow, but different materials are better or worse at producing light as they are heated.
Steel is a pretty good producer of light.
Glass is a very poor producer. If you heat glass it will glow, but it gives off much less light than the same volume of steel. This, by the way, is where the term limelight comes from. Lime also is a good producer of light. Inc. All rights reserved.