• Tower houses 4 spectrum tubes: neon, mercury, helium and hydrogen.
  • Switch turns on all 4 simultaneously, use individual doors to block unwanted lights.
  • Duty cycle for tubes is 30 sec, please don't leave switch on for a long time.
  • Gratings are available that students can keep.

(Keep box stocked with at least 500 gratings)

  • Typical view through a grating.