The color temperature of a light, measured in kelvins, is its most noticeable characteristic. A candle, at 1900 K, appears orange. Daylight, at 5500 K, is much whiter and bluer. A 5500-K bulb, however ...

We look at the different types of headlight bulb and test 10 halogen units to find out which are the leading lights of the bulb world and which don’t make the grade There is a baffling array of ...

Forget tyres or brakes; when it comes to improving safety, new headlamp bulbs should be at the top of your list. After all, what use are the best rubber, pads or discs if you can't see where you are ...