[GreenKeys] Secret DC Basement in NYC - Great History

[Jeffrey D Angus]

On 5/13/2015 9:45 AM, Doug Alderdice wrote:
> It's strange, because at least for me when I look directly at an
> incandescent lamp operating on 25 Hz I don't see the flicker, it's
> something I am more aware of in my peripheral vision.  I find it is
> a little disconcerting at first, but then after a while I don't notice
> it so much. 
On flicker..
<http://www.edn.com/electronics-blogs/ssl-and-backlighting/4399628/Why-Does-Flicker-Matter->



-- 
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com