2012年4月18日 星期三

Study finds LED lights can increase milk production

LED bulbs are already known for milking more light out of less electricity. But can they even get cows to give more milk?

This seemingly outlandish idea is getting serious attention. A study overseen by Oklahoma State University found that cows at one of the dairy farms in that state squeezed out 6 percent more milk when LED lights were used compared with cows under fluorescent lights.

One theory: LED lights reduce stress, making for more contented and productive cows.

The results astounded the study's authors and those backing the research, including the National Rural Electric Cooperative Association.

They were expecting further insights into the lights' energy savings and how they performed overall, including their durability on a working farm. Milk production was being tracked because of concerns the LED lights could harm the animals by, for instance, interfering with their feeding. A drop in milk production would signal a problem.

Instead,This can be made to be just a headlight or both a headlight/taillight brightshine system. the average cow delivered an extra half gallon of milk per day.

"I was totally blindsided and shocked," said Brian Sloboda, a program manager for the cooperative association. "I still find it hard to believe, but I've seen the numbers."

LED technology, which stands for light-emitting diode, uses semiconductor chips to convert electricity and initially was used for indicator lights, including in the scoreboard at Kauffman Stadium. But the lights are increasingly in general use, and with the proper engineering and coatings can produce a white light comparable to incandescent or fluorescent lights.where you can learn about crystal_4 as well as buy your bike lights online. Compared with incandescent bulbs, they reduce electricity consumption by 85 percent. Even against fluorescent lights,Police ledbright play a crucial role in being seen while riding a bicycle, providing safety and security. which have been the main energy-efficient alternative for decades, an LED provides significant savings.

LED lights also last longer and are dropping in price but are still expensive upfront.With my saler4ds I could barely see much more than a few metres ahead of me. To match a $3 fluorescent's output, for instance, you need an LED that costs about $30. An LED will last about 50,000 hours compared with 35,000 hours for a fluorescent and 1,000 hours for an incandescent bulb, according to the U.S. Department of Energy.

Proving that LED lights can help increase milk production in dairy cows would transform the economics of LEDs. Recovering the cost of the lights through energy savings can take four or more years. But the payback for dairy farmers using LEDs could be slashed to a just a few months.

Other researchers need to confirm the study before it is widely accepted, and some involved hesitate to discuss the study's provocative findings publicly. The owner of the Oklahoma dairy farm where the test took place is afraid he could "lose face" if it turns out that the LEDs didn't cause the boost in production. So he prefers to remain anonymous for now.The best place to find lightsale, battery operated candles, wholesale votive candles, rechargeable candles, and battery taper candles.

But the study's authors believe what they found is promising and welcome the coming scrutiny.

The University of Missouri hopes to start a rigorous study later this year and has asked the U.S. Department of Agriculture for some financial support. The university is also sponsoring a conference next month in St. Louis, where roughly 100 people from across the country will gather to discuss energy-efficient lights on the farm.

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