As usually, h7 12v 55w 37r bulb always means h7 halogen bulbs.

Because h7 12v 55w 37r bulb is base on IEC60809 or IEC60810.

All of our h7 12v 55w bulbs are all 37r, so we have Emarks, DOT, ISO9001 and CE certifications.

Meanwhile, our h7 12v 55w 37r bulb is base on “Anti-uv Quartz Glass”.

My customers tested our h7 12v 55w 37r bulb many times that the average life time of our h7 12v 55w 37r bulb is about 800-1200 hours.

In order to make you clearly our h7 12v 55w 37r bulb, I will show you picture as below.

If you can give us h7 12v 55w 37r bulb a chance, I am sure you can save so much money, time and energy.