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clock   Cool-White Lighting & Circadian Rhythm  for which the AMA refers to obesity, cancer and diabetes
See how Government once wasted 20-years by rejecting safety reasoning of the Geochemist.
Compare modern lighting with Lead Poisoning.

 We should soon see health warning labels for cool-white LEDs.

clock having no hands   Disruption of circadian clock (by Prognosis Hope)
linked to AMA reports
NIHPA 2010:  Effect of Light on Circadian Physiology
spd graphic   Compare LED Circadian Effects with tinted eye glasses.
(Uses Melatonin lab test by Mark S. Rea, PhD)

Estimate amount of sleep aid supplement based on Spectral Power Distribution curve, and time

Why are some LEDs more harmful?  Competition and 'Climate Change' puts some where they shouldn't be.

Radford University paper — Dr Patterson and Senator Muskie chairing Environment Committee
See that Melatonin Lowers Breast Cancer Risk         Free SEO Tools

The example cited with Geochemist Clair Patterson shows how the money made by automotive and petroleum industry was more important to government than intelligence of health. In that period of more than 20 years, we suffered poisoning, deaths, disease and illness, merely due to politics. That could have been avoided for more than 10 years. Humans have a circadian rhythm, as we have for many thousands of years, and hopefully will have for thousands more. Our AMA has listed for more than 15 years, the effect of light on Circadian Physiology, and our government is well informed. In September 2013, an actual lab test was publicized showing our blood levels of hormone melatonin and optical activity directly related to light wavelengths. The AMA time line shows their knowledge began with fluorescent lighting.

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Today there are LED scientists that have shown LEDs can be made to avoid the melatonin suppression of cool-white fluorescents and LEDs. But this repeats a money deal, the 20-year refusal that preceded the catalytic converter after Dr Patterson. Success was finally made by Legislative Senator Edmond Muskie and the Environmental Law. LED lighting can help reduce CO2 by providing the necessary luminance with less power. This burns less fossil fuel, putting less CO2 into our atmosphere. The LEDs chosen must avoid Melatonin suppression. LED competition most often begins with efficacy to help payback figures. Common Cool-White LEDs usually have higher efficacy than Warm-White, they use less power which makes less Carbon Dioxide but can actually have greater risk for cancer, diabetes and obesity. A common Cool-White LED unfortunately has high 450nm wavelength radiation which suppresses our Melatonin and leads to more health problems much sooner than Global Warming. With most of today's LEDs this is a balancing act, somewhere between Cool-White saving the cost of energy, and Warm-White saving the cost of health. Adjusting atmospheric CO2 requires generations of time, if even possible. Melatonin related illness caused by lighting can happen in a fraction of that time. Better LED lighting is here. It combines a mixture of proper LEDs, or devotes improved phosphor converted types for the lighting tasks. 'Global Warming' is a worldwide phrase, but more appropriate would be 'Climate Change' because there have been cold temperature records set, and there are cases where that so-called warming occurred BEFORE the CO2 had any change. Man did not and could not cause these events.  If LEDs actually could help, we must regulate their selection for a healthy solution.  This requires the best efficacy, best CRI, best CCT and the lowest 450nm radiation. Trying to reduce our planet's CO2 is of questionable sense.