"safety"

This safe spectrum power supply features encased spectrum tubes.

Every classroom that wants to investigate spectroscopy needs a good-quality spectrum tube and power supply.

This is an excellent and economical set for introductory ray optics.

This Ray Box is a simple, safe, and sturdy source of projected light for many classic optics experiments. Best of all, you don't need a completely dark room to conduct optic experiments due to its high-intensity light!