RHF wrote:


The Obama-Stazi© will be peeping in your windows
at night to see what kind of Lights you are Burning.


No peeping required. Incandescent lamps turn on and off 60 times a
second. Could see it a mile away with a stroboscope.

On Oct 29, 5:16*am, dave wrote:
RHF wrote:

The Obama-Stazi© will be peeping in your windows
at night to see what kind of Lights you are Burning.

- No peeping required.
-*Incandescent lamps turn on and off 60 times
- a second. *Could see it a mile away with a
- stroboscope.

Dave with your Brain a 'stroboscope' is not required.

Bob Dobbs wrote:
dave wrote:

Incandescent lamps turn on and off 60 times a
second.

Not hardly

They indeed do.

Could see it a mile away with a stroboscope.

A stroboscope doesn't see any further
than its own calibrated pulse will illuminate.

Calibrated pulse? A stroboscope is essentially a calibrated shutter.
Nothing more. You heterodyne it against the 60 Hz flicker of the lamps.

http://en.wikipedia.org/wiki/Stroboscope

I saw something on the FLN (Fine Living Network) teevee channel this
morning about a $40.00 lamp which uses LED bulbs and it puts out a
bright light.Do those kind of LED lamps cause RFI?
cuhulin

Bob Dobbs wrote:
Following up on my comments:

Bob Dobbs wrote:
dave wrote:
Incandescent lamps turn on and off 60 times a
second.
Not hardly

More like twice that
Assuming the incandescents are powered by 60 Hz commercial mains,
instead of a DC (photovoltaic/battery) system, the voltage is either full off or
at max twice per cycle and some sinusoidal intermediate value the rest of the
time in between, which is imperceptible due to hysteresis of black body
radiation. (filaments take a small bit of time to start to glow or to go out)

Could see it a mile away with a stroboscope.
A stroboscope doesn't see any further
than its own calibrated pulse will illuminate.

Better to detect type of illumination would be a spectroscope
to determine if the visible spectra is continuous or discontinuous.


Thanks. Two crossings per cycle. Thanks.

The point being missed is that CFLs turn on and off thousands of times a
second, therefore have much less flicker than coal buring Edison lamps.

OLED lighting, Litenin Bugs, Gloworms, sum O' them Fishis in tHe Deep
Blue Sea.

Deeeeeep Bluuuue Seeeeea,,,,,, thars ahh Deeeeeeep Bluuuuue Seeeeea,,,,,
wharrr my luverr,,,,,, she waits forr meeeeeee,,,,,,,,
cuhulin