Comments on: What do LED lights do to our biological clocks?

By: Klane M.

Klane M. — Mon, 07 Mar 2016 14:15:20 +0000

This is a great post Karin,
I think that LED light is better than neon light, especial for eyes.

By: Elmo Glick

Elmo Glick — Sun, 20 Jan 2013 11:10:49 +0000

On the melatonin issue, how does that affect the lives of the local fauna? If their natural sleep cycles are disrupted I’d suspect their procreation results would suffer. Not that I’d miss the wrens and raccoons.

By: Karin Kloosterman

Karin Kloosterman — Wed, 21 Dec 2011 07:22:11 +0000

In reply to scott. It is!

By: scott

scott — Tue, 20 Dec 2011 12:46:29 +0000

Isn’t that a picture of a compact flourescent? It is not an “LED bulb”. Don’t you know what you are talking about? Just sayin!

By: Lo

Lo — Thu, 15 Sep 2011 04:37:57 +0000

CFL’s are really horrible for the environment due to the mercury content and they can contaminate our water supplies if not properly disposed of. As we know, most of us are lazy and toss old bulbs in the garbage with everything else. LED’s are the best and most modern lighting. They are relatively inexpensive now and when I buy mine from EarthLED I have a 3 year warranty on my lights, so I feel better about spending the extra money on longer lasting and warranty backed products.

By: Karin Kloosterman

Karin Kloosterman — Mon, 12 Sep 2011 05:33:55 +0000

Ed hopefully authors of the study will read your comment and take this into account for future studies.

By: Ed Harwood

Ed Harwood — Sun, 11 Sep 2011 19:24:21 +0000

It is true that LED, flourescent and metal halide luminaires provide blue light within their “white” light spectrum, but all of them also have a red component, typically of greater magnitude. Buyers could be advised to look at the Kelvin rating of the bulbs and purchase those with lower numbers, below 4,000 Kelvins. These will increase the red portion of the spectrum as compared to the blue and thus be more like the HPS luminaire. I do not know the impact on melatonin.