Gu10 light bulbs--more appropriately called lamps, as their structure differs from a standard bulb--are usually quartz/halogen, although LED versions are available for some fixtures. Modern track lighting and other ceiling fixtures use these lamps to produce a bright white light with a moderate beam spread. Unlike halogen lamps with a simple two-prong base that pull straight out of their sockets, gu10 lamps have a cylinder at the base of each prong are wider than the prongs that connect the lamp to its socket.

Step 1

Stand on a ladder so you can comfortably reach your light fixture.

Step 2

Press the existing Gu10 lamp into the fixture using both thumbs.

Step 3

Turn the lamp counter-clockwise as you continue to press inward, using the pressure of your thumbs to grip the bulb.

Step 4

Release your pressure on the lamp when it won't turn any farther.

Step 5

Pull the lamp straight out of the socket. You may need to wiggle it gently to get the cylindrical "feet" aligned correctly with the larger openings in the socket.

Step 6

Discard the old lamp and remove packaging from your new lamp. Line the prongs on the new lamp up with the wide openings on the socket.

Step 7

Press inward on the edges of the new lamp with your thumbs and twist the lamp clockwise as far as it will go.