9 个月
The Family Handyman on MSNIncandescent vs. LED Lighting: What’s the Difference?"LED light sources with good color characteristics are now commonly rated for 120-150 lumens/watt," McGowan says. That's ten ...
Bright, twisted light can be produced with technology similar ... Usually photons from a blackbody source are randomly polarized -- their waves may oscillate along any axis. The new study revealed ...
10 个月
The Cool Down on MSNHow much better are LED bulbs than incandescent? The savings may surprise youbulbs is that incandescent lights use a filament that heats up to produce light, while LED lights operate by passing an ...
Many countries have phased out incandescent bulbs because they waste energy by making heat The US is scrapping a ban on energy-inefficient light bulbs which was due to come in at the beginning of ...
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