The best capacitive proximity switch

ANY Timer Switch
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Tokarev 213 asked Compact fluorescent bulbs, energy used during manufacturing and recycling?

I was wondering if anyone had data showing the amount of energy used to manufacture a CFL bulb compared to an incandescent. Also the data on energy needed to recycle the CFLs. Side note: I have yet to get the duration out of the bulbs that the maker claims. I've been getting from 1-3 years out of a CFL, which is about what I was getting from incandescent bulbs. So as far as cost effectiveness, they fail for me.

And got the following answer:

Actually more energy is required to produce CFLs when you consider the extra circuitry of the ballast underneath the coiled tube, which in itself takes more energy to coat and form. then evacuated and then injected with a portioned amount of mercury vapor, and then sealed. An incandescent only requires the envelope and stem which can be made ahead of time, assembled, evacuated and sealed. Finding the exact data you seek would be tough because the manufacturers and promoters of propaganda don't want you to know those "per unit costs," in part because it reveals their profit margins. Now, as for why CFls are burning out for you, I am going to make an assumption they are in a metal fixture, like recessed lighting with a swivel eye, or an exhaust hood made of metal. And most likely they are burning through the side of the glass (a common mode of failure.). This happens because the metal fixture is acting like a capacitive drain, and the ballast works by creating a current waveform of high frequency in the RF range, (you can hear the noise via an AM/MW radio held close to the base of a CFL.) and when certain conditions are met, a small arc through the glass occurs which blows a hole in the glass envelope in the process. If metal light fixture housings are not in use, The other common mode of failure occurs on power sources that are noisy with RF energy, say close proximity to a radio transmitter, or just plain noisy power lines laden with power spikes. These blow out portions of the circuitry due to overloads. Sometimes it is a simple rectifier, others is internal to the IC chip on the the ballest board. You can achieve the same failures by operating them on power from DC to AC inverters that often rely upon a "modified Sine wave" output. The solution is to switch over to an LED luminaire. They are more expensive still, but do not suffer quite as much from RF noise on the power lines other than induced severe voltage spikes. If you cannot locate the source of the line noise, you might do well to incorporate a ferrite coil form or other means of transient supression on the incoming power, such as raiding the EMI filters out of a few surplus computer monitors and wiring them in series with the luminaire. BTW, you can light CFls and other flourescent tubes with the energy from an electric fence, and you can feel the energy transfer because the tube acts as a capacitive path between your hand and the fence. The same principle also occurs under high voltage AC powerlines. http://www.youtube.com/watch?v=pBx2wkg9nhk If you watch, at one point he is swinging simple 48 inch flourescent black light tubes that are being lit by the RF energy of the Tesla coils. In his case his chain mail suit is acting as the path to ground completing the circuit.


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