I bought this to record physics demonstrations at home during eLearning time as I'm a physics teacher and I still wanted to, that my students have a good lab experience despite being at home in front of a computer screen with no lab supplies. We also use these boxes at school so I knew the quality was poor and bought them anyway despite the ridiculous price for some plastic parts. Filters burn through easily, the light used is too strong for what it's intended for, the focusing sucks and there's no power supply included (which I already knew, but for the price). After all, he teaches students about light, color and optics, but at a ridiculous price. If the filters were more durable, the light was LED, the case wasn't so cheap and the power supply was included, it would be a great product. Unfortunately the quality of this product stays the same for many years but we still buy it for student education so the company will never change the product as people buy it (unfortunately I'm part of the problem).