Those would appear to carbide lamps, or "carbide-like" lamps. I think the quoted prices, especially for calcium carbide, actually help explain the decline of the technology. I don't believe this brand of carbide has caught on with cavers these days. Everyone I know has gone to LEDs. Somewhat unfortunately, LEDs aren't nearly as warm as a nicely fired up carbide.

Carbides do have a downside, particularly that naked flame. I remember one SAR where we were responding to an injured victim at night. What was not mentioned was that the victim was in a crashed plane. People were stationed around the crash perimeter, since many of us were known to be using carbide lamps, not a good combination with spilled AV gas everywhere.