Scientists developing super efficient light bulb
Scientists from the US are developing a light bulb with up to 60% efficiency, compared to the standard 5%, using a microscopic tungsten lattice that can convert the majority of wasted infrared energy into the frequencies of visible light.
The light bulb is being developed by the US Department of Energy’s Sandia National Laboratories, and uses a tungsten filament fabricated with an internal crystalline pattern.
The advance also opens up the possibility of increasing the efficiency of thermal photovoltaic applications, say the researchers. The scientists have found that the use of a tungsten lattice in thermal photovoltaics can reach 51% efficiency, compared to the more standard 12% efficiency.
The research is published in this week’s edition of the journal Nature.