MR16 bulbs are cone- or dome-shaped projector bulbs most often used in recessed lighting. Changing an MR16 bulb is as simple as changing any other type of bulb; however, accessing the bulb is sometimes tricky. MR16 bulbs are halogen bulbs; they're attached with a "two-pin" connection instead of a screw socket like many other light bulbs. You can use a stepladder and screwdriver if you need them, but the must-have item for this project is a replacement bulb.
Remove the bulb assembly. Some are attached with screws, but most are held in with clips. Twist the assembly, or use a flathead screwdriver to pry it off.
Disconnect the wiring attached to the rear of the assembly. Pull the wiring away from the assembly to disconnect it.
Set the assembly on a table or another suitable work place.
Remove the bulb from the assembly. The bulb will slide out of the back with ease; however, some assemblies have panels protecting the bulb. Remove this panel first if necessary.
Install the new bulb. Attach it to the assembly securely. Replace any screws or panels on your particular bulb assembly.
Attach the bulb assembly back to the wiring. The two pins connect to the assembly with ease. Mount the bulb assembly back in position; replace any screws or panels you removed to access it.