The problem with the latter is that it tends to generate a very cool light with a blue tinge, while the former is less energy efficient because of their reliance on green LEDs.
Light-colored "cool roofs" that reflect light rather than absorb it can cut cooling costs by as much as 40%, the group says.
When combined with the rest of the blue this forms a cool, white light.
Subsequent observations with an infra-red telescope, which can see things that are too cool to shine with visible light, showed that it was a very faint star so faint that it is off the bottom of astronomers' scale of stellar classification.
They've set free the coolest technology from behind the locked lab doors at IBM, Xerox and the telephone companies and aft of the machine-gun-equipped guards at America's defense contractors, all of whom had reasons of their own--perfectly valid at the time--to keep the cool stuff from seeing the light of day.
It would not have mattered much if the playing had been third rate, so cool was the evening, so light the mood.
Strained and iced down, its captured light and heat turned cool and comforting, like an intimate conversation between good friends just passing into memory.
After the researchers had allowed their wafer to cool, they bathed it in ultraviolet light and saw that some of the squares glowed bright blue.
With the right combination of daytime heat and a smattering of light rain at night to cool the soil, they stand a chance of creating a standout vintage.
"Luckily, we had decided that we were going to wear body armour and helmets because we were going in at first light and it was still quite cool, " he said.
The light from LEDs can be classified as either cool or warm, and these color temperatures can be adjusted and mixed based on personal preferences.
Somebody is going to build wind towers and wind turbines and create the power that's going to light our homes and heat our homes and cool our homes for decades to come.
Hamdan was cool and calm as he addressed the court, wearing a light-colored jacket, a white shirt and traditional white headdress.
"Passive renewable energy" measures, such as using natural ventilation to cool a building and spacing windows to maximize the sun's light, are other ways to slash a building's electric bill.
Sledge described the operation generously: the rooms teeming to the scrolled plaster ceilings with bud-heavy green stalks, the floor cabled with sprinklers, the walls lined with foil reflectors to maximize the ripening effects of the solar-spectrum lamps, the stereo chattering NPR talk radio to cover the drone of the daytime light banks, and classical music to give the plants a cultural heritage through the cool damp night.
According to the company, when you capture all the light traveling in every direction in every point in space, you can do some pretty cool things like focusing a picture after you take it and creating interactive, living pictures.
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Light-colored paving is attractive in warmer climates because it reflects the sun and keeps the area cool, Mr. Justiss says.
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