Things to do with TC

Hi Group,
I don't know if this is well known but Tesla did lots of
experiments tring to make light using TCs and high freq. 
alternators. One interesting demo can be done with a large
clear incandescent bulb, one of thus 60W 6" globe bulbs.
Place the bulb on the toroid so the base touches and apply
small amounts of RF. On my small coil <500W I use only one
spark gap and variac less than 50%. By playing with the setting
I can get various plasma/arc streams within the bulb. 
Dave Huffman