Partsam 10xT10 PC194 168 W5W 2825 SMD LED Gauge Dash Instrument 12V Blue Bulbs 13mm Hole Twist Lock T10 Wedge 194 T-10 147 152 158 159 161 168 184 192 193 Dimension(Length*Width):W2.1x9.5d Wedge Type Bulbs Color:Blue Applications:Gauge Cluster Indicator,Speedometer,Odometer,Tachometer Light If the LED does not light up, simply flip it 180 degrees (reverse the polarity)