Philips calls for a simple switch to reduce energy consumption

| By partnering with The Alliance for Climate Protection and the global | Live Earth concerts on July 7th 2007, Philips aims to inspire more | than two billion people to take simple steps, such as changing a light | bulb, to lead a more energy efficient life. I saw the details at | |

Perhaps you should hold out for the LED lamps.

Because the last for a LONG time, once they "catch on" a good portion of sales will be to folks who don't HAVE to replace a working LED but want to because the newer model has better color.

Right now the CFs still wear out. My home is now nearly saturated with CFs but I still have to buy them occasionally just to cover burn outs.

They use much the same phosphors as fluorescent lamps.

Their colours are currently appauling. They pick the colour which gives the highest lumen/watt so they can claim 1% more than their competitor.

I hate to tell you, but LEDs used for lighting (as opposted to low power LED indicators) also wear out. The phosphor output drops off, but also you get complete failures at a rate governed by the operating temperature, but at very much lower operating temperatures than for CFLs or filament lamps.

As I understand the present "technology" the LEDs are actually UV LEDs with phosphors to convert to visible light.

But, but ... If you end up with a array of LEDs why not just but a mix of various colors together. You can make up any color you want. It should be more efficient than the UV/phosphor LED or am I missing something?

----------------------------- They are available in good spectrums for reading and other tasks- as with regular fluorescents they may be a bit more expensive than the cheapest "cool white" bulbs.

On Fri, 13 Jul 2007 11:47:27 -0300 John Gilmer wrote: | | |> I already have CFLs where CFLs don't cause problems. Once they make some |> light bulbs that don't hurt my eyes, then I can also put those in places |> where I use task lighting for extended (e.g. more than 10 minutes) times, |> such as the kitchen. FYI: it's NOT the flicker ... it's the spectrum. | | Perhaps you should hold out for the LED lamps.

Maybe. LEDs have the same issue, at least for now.

| Because the last for a LONG time, once they "catch on" a good portion of | sales will be to folks who don't HAVE to replace a working LED but want to | because the newer model has better color.

If they fix the color issue, great.

| Right now the CFs still wear out. My home is now nearly saturated with CFs | but I still have to buy them occasionally just to cover burn outs.

I only have 5 in place and have had them only for a year and a half. All still work fine. 4 of them are outside in the cold (in winter) and have had no trouble other than taking a few minutes to warm up to give full brightness (not problem enough to switch back).

On 13 Jul 2007 20:54:03 GMT Andrew Gabriel wrote: | In article , | "John Gilmer" writes: |> |> |>> I already have CFLs where CFLs don't cause problems. Once they make some |>> light bulbs that don't hurt my eyes, then I can also put those in places |>> where I use task lighting for extended (e.g. more than 10 minutes) times, |>> such as the kitchen. FYI: it's NOT the flicker ... it's the spectrum. |> |> Perhaps you should hold out for the LED lamps. | | They use much the same phosphors as fluorescent lamps.

Except for the ones made from multiple LED colors. Both have the issues.

|> Because the last for a LONG time, once they "catch on" a good portion of |> sales will be to folks who don't HAVE to replace a working LED but want to |> because the newer model has better color. | | Their colours are currently appauling. They pick the colour which | gives the highest lumen/watt so they can claim 1% more than their | competitor. | |> Right now the CFs still wear out. My home is now nearly saturated with CFs |> but I still have to buy them occasionally just to cover burn outs. | | I hate to tell you, but LEDs used for lighting (as opposted to low | power LED indicators) also wear out. The phosphor output drops off, | but also you get complete failures at a rate governed by the | operating temperature, but at very much lower operating temperatures | than for CFLs or filament lamps.

It's obvious they wear out. Replacement LEDs are available in stores.

On Fri, 13 Jul 2007 18:06:28 -0300 John Gilmer wrote: | | |> I hate to tell you, but LEDs used for lighting (as opposted to low |> power LED indicators) also wear out. The phosphor output drops off, |> but also you get complete failures at a rate governed by the |> operating temperature, but at very much lower operating temperatures |> than for CFLs or filament lamps. | | As I understand the present "technology" the LEDs are actually UV LEDs with | phosphors to convert to visible light. | | But, but ... If you end up with a array of LEDs why not just but a mix of | various colors together. You can make up any color you want. It should | be more efficient than the UV/phosphor LED or am I missing something?

If there are enough different wavelengths, that might work for making light that is suitably white and with a continuous enough spectrum to really act like white. I've seen 22 different wavelengths in various catalogs. That might be enough to do it. Adjusting the levels of each wavelength to get a nice white might be a lot harder.

|> | By partnering with The Alliance for Climate Protection and the global |> | Live Earth concerts on July 7th 2007, Philips aims to inspire more |> | than two billion people to take simple steps, such as changing a light |> | bulb, to lead a more energy efficient life. I saw the details at |> | |> |

|> I already have CFLs where CFLs don't cause problems. Once they make some |> light bulbs that don't hurt my eyes, then I can also put those in places |> where I use task lighting for extended (e.g. more than 10 minutes) times, |> such as the kitchen. FYI: it's NOT the flicker ... it's the spectrum. | | ----------------------------- | They are available in good spectrums for reading and other tasks- as with | regular fluorescents they may be a bit more expensive than the cheapest | "cool white" bulbs.

I've never seen any with the needed continuous spectra.