High quality auto festoon bulbs have 6 long-lasting white LED's in each and will give your car a unique glow

Pack size: 1 bulbs
Length:    36mm
Color:    Xenon White
Type:    6-SMD 5050 Chips

Ultra Bright LED, unique and more vivid color      
Low Power Consumption and Low Temperature      
Long-lasting Life - 50000 working hours      
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)

APPLICATION:
Perfect for interior light, Door light, Dome light and Map light.

Cross Reference
Festoon 31mm-35mm:
 3021, 3022, 3175, 6428, 6430, 6461, DE3021, DE3022, DE3175
Festoon 36mm-39mm:
 3423, 3425, 6411, 6418, 6423, 6461, DE3425
Festoon 40mm-44mm:
211, 211-2, 212, 212-2, 214-2, 569, 578, 6413, 6429, 12844, DE4410

FAQ
Q: Why the LED doesn't light up?
A: Switch the LED 180 degrees, the problem would be solved.(Make sure the positive and negative connection is right.)