I want to change the halogen bulbs, but I don't know what I have.

To know that cap bulb takes your car, or take out the light bulb in my own car and see if it is H1, H3, H7, H4, etc., Or but I can see it in the car manual in the section on lighting or look on the internet.

The bulbs put 5000K, What does it mean?

What that means is that it is cool white.

There are a few bulbs on the web that are blue in color, can give out blue light?

The light bulbs from the web that are blue in color, it is white in color. Although the bulb is blue, the light is white 5000k, cold white.

And what about the yellow bulbs for who are they worth?

Normally the yellow bulbs are for antinieblas, or if you're driving in landscapes very wet, improve the driver's visibility.

I have a halogen light bulbs in position, and I want to change them because I have been cast.

The first thing you should know is the socket of the bulb. If you have any doubt of that cap light bulb you have, you can send us photo of the bulbs at different levels and will inform you of what it would be.

We stock bushings halogen-as:

-W5W

-C5W

-T20 A POLE

-T20 DOUBLE-POLE

-P21W

Does the halogen is approved for the MOT?

I suggest to you that the halogen-if and when I take of series, if it is approved.