It's 2 different things. You can buy regular incandescent "flood" bulbs, either at HD/Lowe's or at the pet shop. They're just bulbs with reflectors so you don't need the dome fixture, and they heat pretty much as a regular bulb would.
What's in Mike's pic above, and what I assume BSMM is using, are halogen bulbs. You can get them in either flood or spot bulbs, and yes they give off much more heat. They're great for creating a localized hot spot. Don't let them touch anything or get splashed though, they can pop or start fires. Also I would use a ceramic fixture for them, like what you'd use for a CHE. I know people screw them into the cheap sockets but I wouldn't chance it.