For white light, however, two or more wavelengths are required to generate a broad spectrum of light ... photonic crystals into the LED 15. White-light sources based on LEDs have a promising ...

Good LED makers do it right Responsible lighting LED makers issue information on the ... As a rule of thumb for people in general, the ICNIRP suggests that the spectrum of a source that appears to be ...

The standard design is simple; a prism or diffraction grating to break up a light source into a spectrum and a detector to measure light intensity. Shine the light through your sample, scan ...

This is a major worry with LED lamps that are increasingly being installed in cars, often replacing the old-style halogen bulbs that have a very different color spectrum and beam patterns ...