I've bought some cheap led lamps (1w) for use as night lights on the landings, they actually provide useful normal levels but they do "strobe". This is only apparent when you move your hand close to them. I see blue and yellow flashes out of the corner of my eye when i blink under certain types of fluorescent lighting.
Geoff.
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On 14/07/2018 20:47, Roy Morgan wrote:
Ed,
(Sorry, careful searching for Ed¡¯s actual email address revealed nothing.)
I know someone who is very strongly opposed to LED lamps of all kinds (also to halogen lamps). She is certain that LED lamps are very, very bad for humans.
I have not investigated the situation, but I suspect that SOME LED lamps actually put out a chopped, non-continuos light. Do you know anything about this? It seems that the normal tubular fluorescent lamps we have used for many decades do in fact emit a pulsating light, and that some few people are actually do have a negative reaction to the light.
On a related topic: just how much mercury is in the compact fluorescent lamps that are apparently not on the market any more.
In both these situations, I suspect that a heavy dose of alarmism based on some very poor science and the absence of relevant facts is in play.
Roy
