On May 27, 3:27*pm, bpnjensen wrote:
On May 27, 3:21*pm, RHF wrote:









On May 27, 2:48*pm, RHF wrote:

On May 27, 2:20*pm, John Smith wrote:

On 5/27/2011 1:55 PM, Brenda Ann wrote:

...
That's OK... the shill isn't talking about fluorescent ballasts, they're
talking about HID ballasts (mercury vapor, high pressure sodium, metal
halide). Digital technology could be used for these by using "steppers"
to ramp the voltage up and down based upon current detection.

While you are technically correct, about a LED being mentioned in the
original post, the difference between sodium/mercury-vapor and
fluorescent BALLAST is minimal, to an engineer.

Voltage step-up/step-down, or even wave shape has nothing to do with
"digital."

While not absolutely necessary, a digital wave shape will be of a square
wave, however ramp and even sine can be handled with processing. *And, a
simple flip-flop circuit can generate a square wave, process this though
a current regulator, then a voltage regulator and you, basically, have
your "digital ballast", but it has nothing to do with anything truly
"digital."

The name "digital" is more of a marketing scam than anything else it
its' use in describing the ballast, kinda like "solid state" (a pencil
is solid state!), "state of the art" ("new" is simply relative),
"space-age" (products developed after successful space flight), etc..

1) of or relating to the fingers or toes digital dexterity

2) done with a finger a digital rectal examination

3) of, relating to, or using calculation by numerical methods or by
discrete units

4) of, relating to, or being data in the form of especially binary
digits digital images a digital readout; especially : of, relating
to, or employing digital communications signals a digital broadcast
compare analog 2

5) providing a readout in numerical digits a digital voltmeter

6) relating to an audio recording method in which sound waves are
represented digitally (as on magnetic tape) so that in the recording wow
and flutter are eliminated and background noise is reduced

7) electronic digital devices; also : characterized by electronic and
especially computerized technology the digital age

... by Merriam-Webster.

- And, my hand is digital!!! *ROFLOL

To Five Place Accuracy ;;-}} ~ RHF
*.

Regards,
JS

Saw some 'new' GE Reveal CFL Light Bulbs
at Lowes with an Outer Glass Cover
-maybe-
The Best of Both Worlds ) ~ RHFhttp://www.elightbulbs.com/lighting-blog/GE-Reveals-New-Reveal-Compac...

New GE Reveal 'Hybrid' CFL Bulbs
in Traditional Glass A19 Shapehttp://www.thelightingresource.net/ge-introduces-reveal-cfl-bulb-offe...

Should you break the 'inner' CFL Tube
the 'Outer' Glass Envelop saves on the
Clean-Up Problems -great-idea-!-
*.
-better-yet-http://pressroom.geconsumerproducts.com/pr/ge/artwork/9/9/6/7/3/19967...
Three Bulbs in One: GE’s Hybrid Halogen-CFL
with Incandescent Shape Arrives in April 2011http://pressroom.geconsumerproducts.com/pr/ge/three-bulbs-in-one-ge-s...
-and-http://www.genewscenter.com/Press-Releases/Three-Bulbs-in-One-GE-s-Hy...
-question-
GE Hybrid CFL vs. ELS LED Lamp- Who's Better?http://www.elsledtech.com/admarketin...ewsletter.html
*.
~ RHF
*.
*.- Hide quoted text -

- Show quoted text -

Is the outer shell glass, or something more durable, like a polymer?
With glass, if the inside gets broken, there's a pretty good chance
the outside cover would also be broken by the same trauma.

It is Glass -but- not 'thin' Light Bulb Glass
It is Thicker and More Durable like the Glass
on a Halogen Bulb