This ultra bright 32-LEDs (White) MR 16 Spotlight Bulb can be plugged into your 12 volt halogen fixture. Run it for twelve hours a day for a whole year at a cost of about 80 cents. This LED light bulb should last about 10 years, and works well with a dimmer switch.
LED bulbs are compatible with all types of magnetic transformers but not all electronic transformers. Many electronic transformers require a minimum load which is greater than that provided by LED bulbs.

• Bulb Type - MR16 32 LED GX 5.3 Base
• Lifetime - 30,000 hours
• View Angle - 15 Deg
• Operating Voltage - 12V AC/DC
• Consumption - 2.7 Watt