The US DoE’s report on LED Luminaire Reliability: Impact of Color Shift defines four color-shifts (blue ... Centennial Bulb (click to see a webcam of the lamp), is a dim carbon-filament bulb ...

Saturday, December 21 is the shortest day of the year so we thought it would be a good time to appreciate the history of light bulbs ... of the blue diode in the 1990s quickly led to the discovery ...

Another method uses a blue LED and yellow or red phosphors. For a long time, LED bulbs were much more expensive than incandescents; however, today, they are much cheaper and are the primary ...

The smart bulb market continues to get more and more crowded, but TP-Link thinks there's room for another device: the Kasa Filament Smart Bulb, to be specific, which we've been testing to see ...

We tested the low-beam performance of single-filament (9003) and dual-filament (H7) bulbs from GE, Hella, Philips, and Sylvania, and PIAA's dual-filament bulb. We also compared their performance ...