Tech Olympics - lighting

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Across
  1. 5. old lighting causes this
  2. 6. theatrical circuit conector
  3. 8. first theatrical spotlight
  4. 10. device used to control light intensity
  5. 11. wiring from the dimmer to the light
Down
  1. 1. second piece of theatrical lighting
  2. 2. device used to focus light from a lamp
  3. 3. first piece of theatrical lighting
  4. 4. a cut lens with concentric ridges
  5. 7. imaginary number used to group lights
  6. 9. what we call a bulb