LED bulb

:-)

:-(

:-)

What did it cost, $50.00?

---MIKE--- wrote the following:

Did you have a question? My house is loaded with CFLs. From desk lamps to living room lamps, to ceiling fixtures, to outside lamps. I started years ago when they first became available. The first ones were huge and I only used them as utility lamps in closets, basement stairwells, the attic, and the garage.

New Hampshire

Is the brightness really equivalent to a 40W incandescent? I am skeptical of that from the samples I have seen on display.

Googled this up at HD:

He has an LED lamp, not CFL, and is thereby protected from mercury poisoning.

What's your estimate of the amount of mercury that leaks out of a CFL in a decade?

Interesting that the stated power consumption for this bulb is actually HIGHER that for a 40W equivalent CFL...

A lot of light being wasted in a filter to improve the color?

Hmm, Few of them burnt out on me after couple years. Just like CFLs. Lasting 46 years is a myth to me.

Ooops. My brain has been affected by mercury poisoning.

I, and many others of my age, have played with mercury as a kid in the

It apparently prevented autism..Autism has really come on strong since they started worrying about Mercury poisoning.

The word MORON came from the word "Mormon". The extra "M" is for the word MAD, or Mad Moron = Mormon.

Even so, "easily dimmable" is HUGE. In a year or so I might buy some once some reports come back from the field.

I see the reviews mention FM interference, which I have also noticed with CFLs. Not really ideal...

nate

I was wondering about that but had not looked up the comparison. I don't know a lot about electronics but do know that LED's need direct current so part of the extra energy may be in the AC/DC conversion.

I would worry about the color too. I had bought a couple of CFL's that put out such white light that I could not use them indoors and had to consign them to the front porch.

Good news is I understand that new labels are being phased in which will explicitly state color temp so once you find a color temp you like you can stick with it.

nate

CFL lamps also require dc, they rectify the AC powerline ti dc, and then run a high-frequency dc - ac converter tolight the lamp tube itself. There is a large step-up in voltage needed to strike the initial arc thru the tube, and the reduction in mercury reduces trhe pressure in the tube until it heats up a little. Regular tubular fluorescents contain appreciably more mercury than the cfl's do because the arc lengthis mujch longer and the diameter of the tube is much larger.

Did not know that. I do recall someone posting a diagram or picture of internal electronics for a cfl and there was a lot of stuff in there. Surprising that they can make them so cheap.

Frank wrote in news:ipu43o$g07$1@dont- email.me:

mercury is what provides the initial ions for current to flow across the tube. it helps establish the arc.

I took apart a CFL and it only had two transistors,a tiny transformer,a couple of electrolytic caps,2 diodes and some chip caps. It rectifies and DOUBLES the input voltage,then converts to HF AC.