what is the name of this lightbulb
Perhaps Halogen 100W.

Not sure what the 6V is. Maybe &quot;GV&quot;, Walmart's Great Value. They have these bulbs.
Or GY, for GY-type pin-lamp base. There are different pin spreads under the GY family, so make sure you have the right one. See also  https://en.wikipedia.org/wiki/Bi-pin_lamp_base (as suggested in the comments by brhans)
Here's an overview for any interested readers:

From https://patentimages.storage.googleapis.com/b7/73/19/c0beebbacf9410/US8888332.pdf
Here's a link to the above bulb:
https://www.wayfair.ca/HeathZenith--100W-Halogen-Replacement-Bulbs-SL5591A2A-L338-K~HEH1120.html?refid=GX185650380210-HEH1120&amp;device=c&amp;ptid=266190925378&amp;targetid=pla-266190925378&amp;network=g&amp;ireid=3346990&amp;gclid=CjwKCAjwxuuCBhATEiwAIIIz0aQYFiIG9NljPwFZQVfdkUB0BdFae-QcAWGvnQl_A0sqbbXqZTJJHxoCRPUQAvD_BwE