I use the same type as Cooper, I have 2 MVB's set up in my bedroom for them when they're out, and one that gets packed up with me. If you're just looking for one to hang your every-day basking bulb over the enclosure/tank, then the ones that are shorter and clamp to the underside of the tank or the top of the tank are great.
The best part about using one of those for your basking bulb (the ones that hang the light over the tank) is that if your temps get out of whack you can raise or lower your basking bulb easily and then lock it in. Way easier than attaching a "clamp lamp" or like the one in your first link, I advise against any of those with the "clamps", they move, fall, tilt, etc. constantly, drives me crazy...that's one advantage to building a custom wooden enclosure, the basking fixtures are installed in the ceiling and they are typically the kind that you can move/focus anywhere in the tank...and they'll never fall off, tilt, etc.