XPost: alt.home.repair, uk.d-i-y   
   From: Gothberg"@internet.co.is   
      
   On Thu, 20 Dec 2018 07:09:59 -0000, Daniel60    
   wrote:   
      
   > Mark Lloyd wrote on 20/12/2018 3:21 AM:   
   >> On 12/19/18 6:01 AM, William Gothberg wrote:   
   >>   
   >> [snip]   
   >>   
   >>> They probably are fairly crude.  I know they flicker, for example if I   
   >>> use my cordless drill, the chuck appears to spin the wrong way under   
   >>> the LED lighting.   
   >> I remember seeing that with a washing machine (under fluorescent   
   >> lights). As the tub was slowing down, the row of holes around the tub   
   >> would appear to reverse direction. Same thing with (spoked) wagon wheels   
   >> in movies.   
   >> ... and, in real life, the Mag wheels of some cars seem to be spinning   
   > backwards, dependant on the speed at which the car is travelling!!   
      
   In real life?  I assume you mean under streetlighting.  That effect can't   
   occur with a steady lightsource such as the sun.   
      
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