TGP T10 Blue 4 LED SMD Wedge Map Light Bulbs Pair 2003-2011 Cadillac CTS Content: T10 4 LED SMD Blue - Pair Compatibility: Map Lights for the Vehicle (Dome Light Not Included) Color: Blue Dimension: 8x18mm Note: LEDs can be polarity sensitive. If you install these LEDs and they are not working, please flip them around and re-install them and you will be fine!