the National Voluntary Laboratory Accreditation Program

The authors say that cloudy skies are now thousands of times more radiant near cities than they ever have been before. They believe the addition of this extra light affects predatory-prey relationships where the predator hunts using vision.

The sky is blue in daytime because the cloud free atmosphere is good at scattering short wavelengths of light. The scientists believe that unless special care is taken in design and implementation, a switch to whiter LED lights could make the sky brighter on clear nights.

The team believes that cities that have changed to solid state lighting should purchase lamps that emit no upward light, and use “warm white” lights with as little blue light as possible.

The DOE LED Lighting Facts program showcases LED products for general illumination from manufacturers who commit to testing products and reporting performance results according to industry standards. The program also provides information essential to evaluating products and identifying the best options. LED Lighting Facts testing laboratory approval is granted to partners that have submitted proof of accreditation by the National Voluntary Laboratory Accreditation Program (NVLAP), a program administered by the National Institute of Science and Technology (NIST) that provides an unbiased third-party evaluation to testing and calibration laboratories, or have been recognized by other accreditation bodies. Cooper Lighting has NVLAP accreditation for solid-state lighting (SSL) test methods in Energy Efficient Lighting Products.