Each T4.2 Light Cover comes with Super Bright LED bulbs High Quality 12v LED Warning Dashboard Light Eery easy to install it. Will work on all systems that use a 12v power source Replacing inst ent cluster panel, A/C Lights, Dashboard Gauge, Climate Control light bulbs. Low power consumption, long life time. Specification Base: T4.2 LED Per Bulb: 1 SMD Power: 0.5W Lumen: 20LM Milliampere: 50MA Voltage: DC 12V Size: 10 x 12mm (base 10mm, height 12mm) Colour: blue Material: composite material Package Contents: 10 x LED bulb Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.