- Joined
- Jul 9, 2014
- Messages
- 613
Someone said in an earlier post that fluorescent lights don't flicker .. they do unfortunately at 60 cycle per second , most of the time it's not noticeable but is of a very dangerous problem to industry . if you run your lathe at 60 rpm on the same single electrical phase at 60 cycles per second as fluro lights 7 some incandescent bulbs the chuck appears stationary . In the UK it's 50 rpm @ 50 cycles per second ( Hz) .
People who are prone to having epileptic fits are often affected by 60 / 50 hertz flicker . One solution is to either have a phase shift device on some of the lights I an area or in large workshops have the lights evenly split across all the three different phases of the power supply . That way the machinery will always be showing it is moving if it is powered up & in gear etc.
As far as I know , inside an LED strip light all the LED's are run off low voltage groups of almost pure DC generated from smoothed bridge rectifiers so they do not flicker at all .
One LED light source failing in these LED tubes does not usually kill the whole tube either as they are wired up in parallel .
Re the deterioration of LED light out put quality . It's not a great as the deterioration of fluorescent tubes apparently , though I've not actually measured it as I'm now well retired , mentally, physically & emotionally
.
We used to have to take LUX light meter readings every six months for the light levels in all rooms then change out & record the change of all tubes & positions that were found to be below the required light output levels .
It was rare for a tube in an office to be more than two years old because of the reduced light out put it gives over time ( replacement depended on the work being done in the area or if it was a toilet , walk area etc. ) Each light fitting was then decorated with a bar coded sticker printed off our hand held work terminals, so we could see the history of the light & fitting on our computer records back in HQ where planning & ordering of spares was done. We did this to thousands & thousands of florescent tubes every year
People who are prone to having epileptic fits are often affected by 60 / 50 hertz flicker . One solution is to either have a phase shift device on some of the lights I an area or in large workshops have the lights evenly split across all the three different phases of the power supply . That way the machinery will always be showing it is moving if it is powered up & in gear etc.
As far as I know , inside an LED strip light all the LED's are run off low voltage groups of almost pure DC generated from smoothed bridge rectifiers so they do not flicker at all .
One LED light source failing in these LED tubes does not usually kill the whole tube either as they are wired up in parallel .
Re the deterioration of LED light out put quality . It's not a great as the deterioration of fluorescent tubes apparently , though I've not actually measured it as I'm now well retired , mentally, physically & emotionally
.We used to have to take LUX light meter readings every six months for the light levels in all rooms then change out & record the change of all tubes & positions that were found to be below the required light output levels .
It was rare for a tube in an office to be more than two years old because of the reduced light out put it gives over time ( replacement depended on the work being done in the area or if it was a toilet , walk area etc. ) Each light fitting was then decorated with a bar coded sticker printed off our hand held work terminals, so we could see the history of the light & fitting on our computer records back in HQ where planning & ordering of spares was done. We did this to thousands & thousands of florescent tubes every year
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My wife tells me the light is annoying for that reason. lol
