I am back. Work has been really tough recently. Ordinary carbide lamps like I handled back in the 1970s as a student at the Colorado School of Mines now sell new for some $50 to $75. Could some cavers tell us what kind of breezes they can handle? Airflows in mines commonly are in the 0 to 10 MPH range. Faster air is unpleasant to work in. The Indian factory said they have none of the bike headlights they can make in stock. A minimum factory order is 1000 at some $34/@ if I understand them correctly. The Indians sell their normal carbide lamps thru an Ohio company that deals with Amish and others. Petzl lights are sold by the Karst company that deals with cavers. We are looking at $75 plus here. Some modern lamps have an Acetylene generator separate from the lamp. A hose connects the two. Anyone want to try to find one of the bike carbide lamps on Craigslist or, choke, E-bay?