XFool wrote:Why is everything getting more and more complicated?
You mean complications such as dimmers?
V8
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XFool wrote:Why is everything getting more and more complicated?
XFool wrote:Next question (wrong thread?):
Exactly why do leading edge dimmers not work with dimmable LED lights and exactly why do trailing edge dimmers work with dimmable LEDs (assuming they do). For that matter, what is the difference between dimmable and non dimmable LEDs (apart from the obvious...). Something to do with their built in power supply, presumably?
Anyone know the answers, please?
Dod101 wrote:Why are you keeping old tungsten filament bulbs? Hideously expensive compared to the equivalent LED ones. Admittedly LED are fairly expensive to buy in the first place but it is a one off cost and the electricity saving is huge.
Dod
Mike4 wrote:Dod101 wrote:Why are you keeping old tungsten filament bulbs? Hideously expensive compared to the equivalent LED ones. Admittedly LED are fairly expensive to buy in the first place but it is a one off cost and the electricity saving is huge.
Dod
Not in my hovel it isn't!
I find one or another of my LED lamps packs up about once every couple of months and its only a tiny cottage.
As mentioned upthread there are so many combinations now of power, socket type, socket size and bulb shape that I have a dedicated shelf full of spare LED bulbs in the pantry; just as many as I ever had when we used incandescent.
Dicky99 wrote:
I've no idea if they're dimmable because I removed my dimmer switches ages ago in favour of separate light fittings for mood lighting.
Mike4 wrote:I find one or another of my LED lamps packs up about once every couple of months and its only a tiny cottage.
Dod101 wrote:Mike4 wrote:
Not in my hovel it isn't!
I find one or another of my LED lamps packs up about once every couple of months and its only a tiny cottage.
As mentioned upthread there are so many combinations now of power, socket type, socket size and bulb shape that I have a dedicated shelf full of spare LED bulbs in the pantry; just as many as I ever had when we used incandescent.
I would suggest that there is something wrong with your electricity supply. I have had LED bulbs in my kitchen, bathrooms, and reading lamps in my living room for about five years and I can only think of one that has blown in that time. The savings in electricity are dramatic.
Dod
PS Or your LED supplier. Plenty cheapie ones around.
D
kempiejon wrote:I remember at the time LEDhut was getting high praise for quality and guarantee so I used them. I needed about 20 lamps for the whole property, we have a 2 bed flat. A chum moved at the same time to a larger property he had 20 lamps in his kitchen alone.
bungeejumper wrote:Agree that there's something amiss if LEDs keep on popping, though. It might just be a dicky deep-rural supply, of course. (Mike4, ISTR you saying that you get a lot of power cuts, and that you have an overhead power supply line to your house?)
In my last village house, the local farmer used heavy-duty equipment that made the lights flicker. Then one day, there was a loud bang and my printer and computer both went up in smoke. (Literally. There were flames coming from the printer!)
Power company came in and said this was due to power surges, which were pretty normal when things like grain driers were in use. He'd also seen up to 500 volts coming through urban circuits - only momentarily, of course, and usually caused by high-drain stuff like fairground equipment. Either way, I was able to claim for the techno damage, so honour was satisfied. Oh,and I use a UPS for the computers nowadays. Can't be too careful.
BJ
DrFfybes wrote:
Consequently we bought a spare of each type, thus guranteeing either no failures whatsoever whilst we live here, or 2 at once.
Paul
Mike4 wrote:Dod101 wrote:Why are you keeping old tungsten filament bulbs? Hideously expensive compared to the equivalent LED ones. Admittedly LED are fairly expensive to buy in the first place but it is a one off cost and the electricity saving is huge.
Dod
Not in my hovel it isn't!
I find one or another of my LED lamps packs up about once every couple of months and its only a tiny cottage.
servodude wrote:I don't know what your base level understanding is electronics/electric stuff
- but start with this for a review of the dimming differences https://www.lamps-on-line.com/leading-trailing-edge-led-dimmers
The LEDs themselves are effectively working at DC and your two ways of controlling the amount of light emitted are by changing the current through it or by strobing it super quick
- how you get there from the AC supply is where the power gubbins of the LED does it's magic
...but anyway if you look at the difference in the output of the trailing edge vs the leading edge from the link I gave, you'll see that the abrupt change in voltage is at the end rather than start.
If that abrupt change (or edge) is at the start you get a hard inrush of current every cycle, this gives you buzzing and makes the thing altogether more twitchy and harder to control
- the alternative with that edge at the end gives a soft rise every cycle that is nicer (less stressing) on low voltage electronic equipment downstream to deal with.... but you can't just implement it with a cheap triac
XFool wrote:servodude wrote:I don't know what your base level understanding is electronics/electric stuff
- but start with this for a review of the dimming differences https://www.lamps-on-line.com/leading-trailing-edge-led-dimmers
The LEDs themselves are effectively working at DC and your two ways of controlling the amount of light emitted are by changing the current through it or by strobing it super quick
- how you get there from the AC supply is where the power gubbins of the LED does it's magic
...but anyway if you look at the difference in the output of the trailing edge vs the leading edge from the link I gave, you'll see that the abrupt change in voltage is at the end rather than start.
If that abrupt change (or edge) is at the start you get a hard inrush of current every cycle, this gives you buzzing and makes the thing altogether more twitchy and harder to control
- the alternative with that edge at the end gives a soft rise every cycle that is nicer (less stressing) on low voltage electronic equipment downstream to deal with.... but you can't just implement it with a cheap triac
Thanks for the information, servodude.
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