Posted by Marc Martin on
URL: https://www.es-forum.com/LED-filament-bulbs-tp4034862p4034873.html

> What about the affect on the eyes? Do these cause damage like regular LEDs?

Are we talking about eye damage from the excessive blue light in the spectral distribution?  If so, you can workaround this by:

1) buying lights with the highest CRI values possible, as I do not believe you can have an excessive blue light spike with a high CRI value.  Incandescent lights have a CRI value of 100, which is the highest possible value.  All of the LED bulbs I've been testing have a CRI value of 95, which is about as high as you can get with current LED technology.  Low values of CRI would be less than 80, and indeed you could have a fairly high blue light spike with that.

2) buying lights with a low as color temperature as possible.  LED lights are sold with color temperatures ranging from 2100k (warm) to 6500k (cool).  The higher color temperatures are more blueish in general.  It seems like people generally prefer the 2700 - 3000K range, which is generally more red/yellow than blue.  And 2700K is the color temperature of the old incandescent lights.

Marc