As usually, h7 bulb are always using as low beam, but some cars using h7 bulb as high beam.

Because h7 low beam bulb is huge quantity in the world markets, there are many factories rush into this field.

It makes h7 low beam bulb is over competition.

In order to cut down price, some customers have to use worse materials of h7 low beam bulb.

So the life time of h7 low beam bulb is very different from different factories.

Our h7 low beam bulbs are all using high quality materails and life time is over 800 hours.

Most customers always call our h7 low beam bulbs as “h7ll bulb”.