RATTLES:The world’s most affordable electric lamps are coming.
That’s the goal of a new generation of smart wall lamps, which can be set to emit a variety of wavelengths to provide a more appealing and cost-effective light source for homeowners and office workers.
In a recent report published in the journal Energy and Environmental Science, researchers from Duke University and the University of Illinois at Urbana-Champaign have demonstrated that a compact, portable solar lamp can achieve its full potential when compared to a traditional, large, expensive, high-efficiency, fluorescent lighting source.
This is the first study to demonstrate that the solar lamp could have a significant impact on the efficiency of a typical fluorescent lighting system and also demonstrate that it can be used in residential and commercial applications, says Michael P. Leung, professor of electrical engineering at Duke University.
“Our study shows that we can achieve significant cost savings when we use inexpensive solar light sources, like these solar lamp displays, in residential lighting,” Leung says.
“Solar light is the cheapest form of energy in the world, so we wanted to see if the solar light source could be scaled up to meet demand and make a difference in our lives,” he says.
“The answer is yes.”
Leung and his team built a solar lamp display that can be mounted on a wall, attached to a ceiling or wall with an attached ceiling fan, or on a door frame.
The solar lamp was first designed for use by the National Science Foundation (NSF) and was a finalist in the 2017 NSF Innovative Nanoscale Science and Engineering Award, and won the 2017 Design of the Year award.
The new study, published in Advanced Energy Materials, uses this design to design a new, smaller and cheaper solar lamp.
In its new study , Leung’s team built two prototypes that are both small and compact.
The smallest model, about the size of a credit card, can be installed on a tabletop.
The other prototype is slightly larger, measuring about the same size as a large desktop monitor.
Both models emit different wavelengths, each wavelength measuring between 4 and 6 nanometers.
“Each wavelength has its own light output,” Leuk says.
For this study, the team focused on two wavelengths, a blue light and a red light.
The researchers used a standard photovoltaic (PV) solar cell to convert the blue light into light energy and the red light into heat.
The photovolts are stored in a flexible, carbon-filled material called a polystyrene film.
The light output is determined by how much energy the film absorbs and how much heat is produced.
Leung says that when designing the solar display, the researchers considered the color and light output of a traditional fluorescent lamp and also considered the light output from a traditional ceiling fan.
The latter was considered the “true” energy-dense light source.
Leuk says that although the solar panel uses a traditional photovulcanic material, the new solar lamp has a number of additional features that make it unique. “
We wanted something that would be very inexpensive, easy to build and operate, and had high light output.”
Leuk says that although the solar panel uses a traditional photovulcanic material, the new solar lamp has a number of additional features that make it unique.
“It uses an internal combustion engine, and the energy that the light is absorbed is sent to a heat exchanger in a portable, portable location,” Leuh says.
Leuk and his colleagues also found that the lamp can be configured to emit different colors, such as red, blue and yellow, for a variety, depending on the wavelength.
“To do this, we created a set of photomultiplier plates, which are a series of concentric plates that are made up of different colors and are then connected by an electric current,” Leu says.
The researchers also found it is possible to use an aluminum plate for both blue and red light, so the panel can be scaled to different sizes and for different colors.
“This is very exciting because you can now do these kinds of things in the lab and not have to build a lot of expensive panels,” Leus says.
According to Leuh, the energy efficiency of the new lamp is around 50 percent.
The energy density is around 90 percent.
Leu says that his group is now planning to expand the size and range of the solar system and expand the number of panels to cover a wider range of different wavelengths.
“We are looking at a lot more wavelengths in the future,” he notes.
“I think it will really be a new kind of light source and it’s going to be really interesting to see what kind of benefits it has in terms of how it affects the energy use in homes and offices.”
The study was funded by the U.S. Department of Energy