STEM Ray box
Our STEM Ray box is compact and has a simple, clean design and can be powered by a 12 volt, 800 milliamps, power supply. This particular pack comes with a spare bulb, colour filters, a selection of combs, collimating lens(helps to keep the rays of light coming from the box parallel) and lens holder. An instruction leaflet for setting up and fault finding is included.
This device, with its more powerful light source, works well in a darkened room, and in a cardboard box with a huddle of pupils.