Researchers have designed a new LED-based train headlight that uses a tenth of the energy required for headlights using conventional light sources. If operated 8 hours every day, the electricity ...
Jay Holben The next in line on our examination of lighting fixtures is the PAR, which is an acronym for Parabolic Aluminum Reflector. The classic PAR is a reflector and lamp all in one. It is a sealed ...
WASHINGTON -- Researchers have designed a new LED-based train headlight that uses a tenth of the energy required for headlights using conventional light sources. If operated 8 hours every day, the ...
A light rigid structure (of aluminum or other material) which reflects sound to a focus at which a MICROPHONE is placed. This focussing effect is very strong with WAVELENGTHs less than the aperture of ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results