Review on 🔬 Eisco Labs Economy Spectroscope Tube: Superior Test, Measurement, and Inspection by Joseph Hall

looks more like a toy than a serious instrument. However, this is enough to get a general idea of what the light spectrum from different light sources looks like. If I didn't already know what I was seeing, I think it would be hard to learn from it. For home schooling or classroom use, it would be better to get one with a scale. Even if the scale were a bit imprecise, it would at least give you a rough idea. With that, it entirely depends on your knowledge of what to expect to interpret what you're seeing. I wanted to compare some LED lighting with some fluorescent and incandescent lighting. it was good enough for that, but just barely.