The GU7 halogen light bulbs are a little different than other kinds of standard 12 volt types that you might be used to in an MR16. The base has a sturdy two prong base with the ability to twist and lock for a secure seating which has sometimes been the complaint about 12 volt lamps, that the pins are a little too flimsy. Like all halogen capsule bulbs, they are filled with a special gas that actually rebuilds the filament and provides long life over the old type of incandescent flood lights. In general, The MR16 is the one that has a 2 inch reflector with a silvered (dichroic) coating which is usually faceted. They have a bipin or GU7 base which pushes into the socket. There is usually a holder in the fixture or sometimes they are out in the open. For your replacement GU7 twist lock bulbs, you get the benefits of the great light of an MR16 while getting the positive connection that some fixture manufacturers have opted for.
Halogen bulbs should not be touched with your skin as the oils can react with the glass. That's true of these as well; the actual bulb characteristics are the same even if the socket is different. In case you ever do touch a halogen light bulb, wipe it thoroughly with a soft cloth or perhaps use some alcohol wipe to take it off thoroughly. If you have MR16 GU7 bulbs in your home or business, then you want to make sure of several characteristics when replacing them. You need to make sure that the reflector opening is 2 inches, verify the operating voltage of the lamp and the pin spacing of the bulbs themselves. A typical GU7 halogen has a pin spacing at 7 millimeters and has two twist lock posts that go into the socket.
In summary, GU7 halogen light bulbs are available in a variety of wattages, and they have a unique construction that isn't all that common but is being specified more in new lighting systems. Of course, you will need fixtures that will have the correct equipment for the GU7 MR16 halogen bulbs. You'll be happy with the results as they will emit a whiter, brighter light that is considered by a vast majority of people more desirable than regular light bulbs. We have a large inventory of halogen bulbs for nearly every type of light fixture in the field. If you need help identifying a halogen bulb, our customer service representatives can help you determine what you have.