Re: VU1 ESL bulbs with HA dimmers?

["Joesepi" <JRM@xxxxxxxxxxxx>]

I doubt voltage of the electron emitter  beam has anything to do with
deflection but rather the amount of energy to light up the increased area of
a larger screen in the same amount of time. The voltage on the deflection
plates may need to be higher to change the angle amount.

I would conclude to get 50, 100 or even 200W of light a fair bit of energy
would be required and therefore a large voltage, also. What was the enrgy of
light output from the ole' CRT screen. I always had about 300W, in mind, for
a larger TV set. but only based on rough hearsay from TV guys.


"Dave Houston" <nobody@xxxxxxxxxxxx> wrote in message
news:4aba5e35.30488687@xxxxxxxxxxxxxxxx
> Well, it's been nearly 50 years since I learned about CRTs but, as I dimly
> recall, higher voltages are required for higher delection of the beam so
> the
> bigger the CRT the higher the voltage. Few B&W TVs had large screens so
> they
> had lower voltages. Since these folks are not deflecting a beam, the
> voltage
> is likely to be much less. And, even if they were deflecting a beam, the
> "screen" size is much, much smaller than a TV.
>
> I asked Vu1 about the internal voltage and whether the bulbs emit x-rays
> and
> got the following (non)response.
>
> "Detail specifications will be made available after independent and UL lab
> testing have completed.  Please refer to our website and blog site for
> current updates."
>
> I do not know whether UL will test for x-rays.
>
> Ian Shef <invalid@xxxxxxxxxxxxx> wrote:
>
>>nobody@xxxxxxxxxxxx (Dave Houston) wrote in
>>news:4ab843ef.65491421@xxxxxxxxxxxxx:
>>
>>> I think that was only for color TVs where the voltage is 32,000 volts.
>>> Radiation increases with the voltage. It's not likely that these lights
>>> will have anywhere near that voltage - not if they are going to fit
>>> existing fixtures.
>>
>>The TVs get the same line voltage that these bulbs get.  Also, high
>>voltage
>>supplies can be made quite tiny if the current is low and if the
>>environment
>>suppresses arcing.
>>
>>While I agree that these bulbs are likely to be safe, I think that the
>>issue
>>bears scrutiny.  Trust, but verify!
>