Under LED lights, your clothes can’t get “whiter-than-white”
News from Quartz:

Uh oh. Flickr/Classic_Films

LED lightbulbs are incredibly energy efficient (pdf), but they could do a number on your crisp white button-downs: According to a new study led by Kevin Houser, a professor of architectural engineering at Penn State University, the most common type of LED lightbulb renders clothing brighteners—the chemicals in detergents that claim to make your whites whiter—useless.

Unlike bleaches, those detergents don’t actually change the fabric’s color: but they make it look whiter, at least under the lights we’re used to. Optical brighteners are used to make white clothes (and other things, includ…………… continues on Quartz

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Tech Tips: LED lighting’s caveat emptor
News from Carroll County Times:

LED lighting is indeed the wave of the future, offering long, useful life of 50,000 or more hours with an accompanying reduction in energy consumption that approaches 50 percent in some cases. So it’s no wonder that the prospect of lower lighting costs associated with not needing to replace the lighting for five or more years and with paying less in energy costs is causing such a stir for both consumers and suppliers of energy alike. But buyers need to beware if they expect to have their cake and eat it too.

Commercial and industrial consumers of lighting are driven by the prospect of lowering their energy maintenance and replacement costs by trading the high-cost, inefficient fluorescent tubes in their offices and the high power discharge lamps on roadway and parking lots for more efficient, longer-life LED lighting. What’s more, the value of the energy saved will pay back the cost of the lighting project in less than three years in most cases and generate lighting investment returns that exceed the returns of other traditional investment vehicles, such as equities. Likewise, under the prospect of reducing the demand for power, thus postponing the high monetary costs and the environmental risks associated with bringing more power-generating capacity online, suppliers of energy and the government regulat…………… continues on Carroll County Times

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