Partsam 20pcs Blue T10 PC168 LED Light Bulb 8-SMD Instrument Panel Cluster Speedometer Odometer Temp Gauges Lighting Lamp Made by high quality aluminum alloy housing can + virtually unbreakable PMMA Lens. Aluminum alloy shell acts as radiant heat sink, ensure the secure temperature range. Environmental-friendly: energy saving, no UV and IR radiation, shock-proof and anti-corrosion Easy installation, just plug & play? Faster on/off response time and vibration resistant??? ? If the LED does not light up, simply flip it 180 degrees? (reverse the polarity)