Red Alert on Green Bulbs

[annily]

My Woolies 23W job draws 210ma therefore it is a 50.4W globe. Is there a bit
of skullduggery going on here?????????

My alternating current theory is rusty, but couldn't that be due to the
difference between VA (Volts * Amps) and Watts?

 

[Phil Allison]

"annily"

My alternating current theory is rusty, but couldn't that be due to the
difference between VA (Volts * Amps) and Watts?

** The power factor ( PF) for most CFLs is around 0.4 to 0.5 - so a 23
watt rating corresponds with 50 VA.

For comparison, my desk lamp uses a 15 watt fluoro tube with an iron core
ballast choke and starter in the base - it has a current draw of 310mA.

Makes the PF = 0.2


....... Phil

 

[son of a bitch]

My Woolies 23W job draws 210ma therefore it is a 50.4W globe. Is there a bit
of skullduggery going on here?????????

No different than going to Audio Shop and you see 4" 1,000 watt
speakers. There is a BIG difference between RMS Power and Peek Power,
but people only things with bigger numbers written on them.

 

[son of a bitch]

My Woolies 23W job draws 210ma therefore it is a 50.4W globe. Is there a bit
of skullduggery going on here?????????

No different than going to Audio Shop and you see 4" 1,000 watt
speakers. There is a BIG difference between RMS Power and Peek Power,
but people only buy things with bigger numbers written on them.

 

[Brocollinni Incognito]

On Sun, 18 Jan 2009 22:18:19 -0800, Fran wrote:

The fact of the matter is that unlike incandescent bulbs, CFL bulbs are
typically made of a polymer, which is feasible because they don't heat
up. That's why they tend not to break if they are knocked or fall onto
carpet, and if they do they don't shatter.

Err. They *do* shatter.

 

[[email protected]]

"annily"


** The power factor ( PF) for most CFLs is around 0.4 to 0.5 - so a 23
watt rating corresponds with 50 VA.

For comparison, my desk lamp uses a 15 watt fluoro tube with an iron core
ballast choke and starter in the base - it has a current draw of 310mA.

Makes the PF = 0.2


...... Phil

So the next question is
'What do we actually pay for on our electricity bill?'

Graeme

 

[annily]

So the next question is
'What do we actually pay for on our electricity bill?'

Graeme

Well, it's supposed to be based on so much per kilowatt-hour, not kVA,
so I hope we are paying for watts, not VA.

 

[SG1]

Well, it's supposed to be based on so much per kilowatt-hour, not kVA, so
I hope we are paying for watts, not VA.

Hope to be paying less soon. A 1KW solar cell jobby going on roof. Cost to
me $355 cost to the feds $8000. Only problems night & clouds.

 

[Phil Allison]

So the next question is
'What do we actually pay for on our electricity bill?'

** The watts figure is the one.

Domestic electricity meters measure energy consumption = watts over time.



........ Phil

 

[David L. Jones]

Hope to be paying less soon. A 1KW solar cell jobby going on roof. Cost to
me $355 cost to the feds $8000. Only problems night & clouds.

Crikey, that's practically free!
Where do you live?

Dave.

 

[SG1]

Crikey, that's practically free!
Where do you live?

Dave.

The Qld government had a lottery and I was toooo late for it, but they
arranged a contract with a company to supply at $355 above the feds rebate,
which I got approval for the other week. Oh the feds are dropping the rebate
to $7500 soon.

 

[MoiInAust]

My alternating current theory is rusty, but couldn't that be due to the
difference between VA (Volts * Amps) and Watts?

Surely with a purely resistive load VA is exactly the same as Watts?

 

[MoiInAust]

So the next question is
'What do we actually pay for on our electricity bill?'

Sorry about m last ignorant post about VA = W! Of course Phil is right.
CFLs are not pure resistive loads!

 

[Phil Allison]

"MoiInAust"

Surely with a purely resistive load VA is exactly the same as Watts?

** Shame most fluoros and CFLs are nothing like resistors.




...... Phil

 

[MoiInAust]

There is a BIG difference between RMS Power and Peek Power,


Woof...

 

[David L. Jones]

The Qld government had a lottery and I was toooo late for it, but they
arranged a contract with a company to supply at $355 above the feds
rebate, which I got approval for the other week. Oh the feds are dropping
the rebate to $7500 soon.

Damn, you got lucky.
Last I looked it was like $14K to install a 1KW system in Sydney, so approx
$7K out of your own pocket.
If it dropped to say a few $K difference it'll be a no-brainer for me.

Dave.

 

[David L. Jones]

The Qld government had a lottery and I was toooo late for it, but they
arranged a contract with a company to supply at $355 above the feds
rebate, which I got approval for the other week. Oh the feds are dropping
the rebate to $7500 soon.

Damn, you got lucky.
Last I looked it was like $14K to install a 1KW system in Sydney, so approx
$7K out of your own pocket.
If it dropped to say a few $K difference it'll be a no-brainer for me.

Dave.

 

[SG1]

Damn, you got lucky.
Last I looked it was like $14K to install a 1KW system in Sydney, so
approx $7K out of your own pocket.
If it dropped to say a few $K difference it'll be a no-brainer for me.

Dave.

They are advertising a $4K difference with local Toowoomba company here. Get
onto you local polly and start a movement to get a similar scheme started.
Costs the states zip, as the feds pay & the contracting company is as busy
as hell on a hot day.

 

[Mr.T]

Surely with a purely resistive load VA is exactly the same as Watts?

Sure is, pity a CFL is nowhere near a "purely resistive load" though.

MrT.

 

[Mr.T]

There is a BIG difference between RMS Power and Peek Power,

"Peek power"? Is that when you glance at the power meter?

MrT.