It will definitely get hotter faster then other materials, but the amount of energy shining on it generally isn't enough to make it particularly warm to the touch because it's got really low surface area and indoor lights aren't that strong.

However if you coated your car with this stuff and left it out in the summer noonday sun... it would get pretty hot.

It's pretty close to a black body, so you can use those calculations to see roughly how hot it would get depending on how much energy you applied.

https://en.wikipedia.org/wiki/Black_body

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