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I completely disagree. At the present, Leds are still relatively expensive (which will be less so as more of them are used), but their lower use of natural resources (and no mercury), their longer life, and greater efficiency gives them the edge over fluorescents. I have replaced my ceiling recessed lighting fluorescents with LEDs and they give more and whiter light, at about half the power consumption as the compact fluorescents that were replaced (which seemed to have relatively poor lifetime in that application, apparently due to heat build-up in recessed fixtures).A colleague gave this report to me, stating that work on mains powered LED light bulbs is generally a waste of time, do you agree.?..
I completely disagree. At the present, Leds are still relatively expensive (which will be less so as more of them are used), but their lower use of natural resources (and no mercury), their longer life, and greater efficiency gives them the edge over fluorescents.
its easy and cheap to make high frequency fluorescent ballasts which alleviate the problem of buzzing and flickering.And best of all, no buzzing or flickering!!
how commonplace do leds have to be before they fall to a reasonable price?.....leds are already used in the absolute billions....almost every television is filled with hundreds of ledsLeds are still relatively expensive (which will be less so as more of them are used),
ok thanks for the comparison, but we'd need details of makes models etc to see if it was a just comparison.......in any case, you say its a "recessed" light, which suggests "downlighting", and indeed the directional property of leds does actually make them preferable for downlighting. so I concede that point to you...however, for general all-room lighting, leds are a poor second to fluorescents.I have replaced my ceiling recessed lighting fluorescents with LEDs and they give more and whiter light, at about half the power consumption as the compact fluorescents that were replaced
this is certainly interesting...though I suspect this is more funded from a government researching inquisitively into led performance, rather than any genuine belief that leds make more efficient streetlights than sodium or induction lamps etc....of course, I appreciate that you were never saying that they were....but this interesting point does emerge from your valuable observation....(ie, im not arguing with you on this point)Recently my city converted all its streetlights (they were orange sodium vapour) to white LEDs and the light is good
its easy and cheap to make high frequency fluorescent ballasts which alleviate the problem of buzzing and flickering.
flicker doesn't happen to HF flu's if designed properly.flickering - NO!.
flicker doesn't happen to HF flu's if designed properly.
By "endless maintenance", I take it you mean you believe they fail more often than led so they need replacing more often?
....high frequency electronic ballasts don't have starters......youre talking about the old fashioned 50hz fluorescents....a totally different thing.replacing tubes or starters
Ah, that will be because they're connected in parallel .You can clearly see the defective LEDs that do not work
Traffic lights would NEVER have the LEDs in parallel like cheap Chinese flashlights. Since they operate on mains voltage then the LEDs are probably in series.Ah, that will be because they're connected in parallel .
In the US you are paying $8 for a LED bulb?...that's £5.12 UK.....I cannot understand this, I thought stuff was cheap in USA?......I pay about £2.00 for CFL bulbs in UK. They must last a long time as I hardly ever have to buy them for replacement. LED bulbs with bayonet fittings in UK cost about £13 (and thats for 6W = same as 60W incandescent) . £13 is a ridiculous price for a light bulb.I use LED's for almost everything now. I have several LED "bulbs" designed for 120vac mains operation and they work pretty nice and use very little power. They go on sale a lot now too so you can pick one up for about 8 dollars USD.
In the US you are paying $8 for a LED bulb?...that's £5.12 UK.....I cannot understand this, I thought stuff was cheap in USA?......I pay about £2.00 for CFL bulbs in UK. They must last a long time as I hardly ever have to buy them for replacement. LED bulbs with bayonet fittings in UK cost about £13 (and thats for 6W = same as 60W incandescent) . £13 is a ridiculous price for a light bulb.
(and thats for 6W = same as 60W incandescent).
Don't have a crystal ball to for LED price drop, but I know the LED prices have come down significantly in the past few years and I expect in a few more they will be approaching the prices of CFLs.how commonplace do leds have to be before they fall to a reasonable price?.....leds are already used in the absolute billions....almost every television is filled with hundreds of leds
ok thanks for the comparison, but we'd need details of makes models etc to see if it was a just comparison.......in any case, you say its a "recessed" light, which suggests "downlighting", and indeed the directional property of leds does actually make them preferable for downlighting. so I concede that point to you...however, for general all-room lighting, leds are a poor second to fluorescents.
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And why is that? We need more details to see if that's a justifiable statement.for general all-room lighting, leds are a poor second to fluorescents