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 Post subject: Sensitivity to certain types of light
Post Number:#1  PostPosted: Sun Nov 09, 2008 1:53 am 
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Joined: 19 April 2008
Posts: 183
Location: South of Hampshire
My school had plenty of pre-1980s fluorescent lights including those with big fat tubes. One of the kids found the flickering objectionable and it affected his reading. The head couldn't understand what all the fuss was about and called in an electrician. The electrician checked the lights and found there was nothing wrong with them. The tubes were then cleaned to remove the dust but that didn't improve things.

The kid claimed that blue tinted sunglasses improved his vision significantly, but the science teacher wouldn't take him seriously and the head didn't think that blue sunglasses was acceptable with school uniform.

Has anybody reading this had similar experiences with flicker from fluorescent lights? Old fashioned fluorescents flicker at 100Hz but modern fluorescents and low energy bulbs drive their tubes at a high frequency so don't flicker. My eyes are sensitive to the blueish-green glow of mercury street lights. They don't seem to exist in Britain nowadays but are common in the US. I encountered them somewhere in Surrey (Redhill?) in the early 80s and they were driving me insane.

Another related issue is flicker from CRTs. In the early 1990s there was some concern over video games causing seizures and fits. I read somewhere that older British TVs were more likely to cause seizures and fits than newer Japanese TVs. I'm not sure why. I suspected there could be a secondary flickering effect or another visual instability when some TVs were connected to a game console, but a few experiments with different TVs didn't reveal anything of the sort. A possible explanation was that a high proportion of game consoles were connected to old TVs. Anecdotal evidence from the early 1990s stated that old TVs often ended up in kid's bedrooms.


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 Post subject: Re: Sensitivity to certain types of light
Post Number:#2  PostPosted: Sun Nov 09, 2008 2:01 am 
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Joined: 31 October 2008
Posts: 1
My husband is sensitive to lights flickering. It was quite bad when we were at university and he actually got a pair of tinted glasses from his optician to help with the problem at one point. He doesn't seem to be very affected by it any more...so maybe it was just the lighting at uni that bothered him...or he's just got better at coping with it?


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 Post subject: Re: Sensitivity to certain types of light
Post Number:#3  PostPosted: Sun Nov 09, 2008 2:34 pm 
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Joined: 16 July 2008
Posts: 113
My son used to say that prolonged exposure to the fluorescent lights in some of the classrooms at one of his primary schools gave him a headache. Nobody at the time understood why and why the lights in other classrooms and at home didn't give him a headache. More recently I have found out about light sensitivity and problems resulting from the flickering of older fluorescent lights.

I remember the concern about video games resulting in fits and seizures back in the early 90s. Was it ever backed up by evidence or was it another technology scare because you don't hear anything about it nowadays? Modern video games are more graphically intense and flashy than those from the era of Sonic the Hedgehog.


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 Post subject: Re: Sensitivity to certain types of light
Post Number:#4  PostPosted: Sat May 15, 2010 9:31 am 
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Joined: 19 April 2008
Posts: 183
Location: South of Hampshire
LED bulbs are now available as replacements for incandescent bulbs. If you have ever used them then what is your verdict?


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