Spectroscope

I got an email today from InspectorPro Insurance asking for feedback from some questions, among them being what are the benefits and limitations of spectroscopes. Do any of you guys use a spectroscope? And if so, what for? Can it tell you anything about the flame in a gas appliance? I've never heard of any home inspector using anything like this. There's a little itching in the back of my brain that's telling me that they really mean borescope. But I thought I'd ask, because if a spectroscope would really come in handy that would be awfully cool. Steve

source https://www.inspectorsjournal.com/topic/19049-spectroscope/?do=findComment&comment=174709