The numbers you see on the box don't always work out in real life. LED bulbs do last longer, but those claims about five to 10 years are estimates based on internal testing -- and companies are always ...

Before a spectrometer can do any useful work, it needs to be calibrated to identify wavelengths correctly. This is usually done by detecting several characteristic peaks or dips in a well-known ...

Drivers believe net zero bulbs used in car headlights are dangerously bright, according to a survey. A poll of around 1,700 motorists found that the brightness of eco-friendly headlights was the most ...