cfl's

[Trevor Wilson]

UV does pass thru glass

**Considerably attenuated.

you STFU (egotistical twit!)

**I'm not the one making the stupid claims.

The appropriate response from you should be to acknowledge your
considerable errors, rather than continuing to back yourself into a corner.

You're wrong. Admit it and move on.

 

[felix_unger]

which goes thru the glass

**Considerably attenuated.


**I'm not the one making the stupid claims.

The appropriate response from you should be to acknowledge your
considerable errors, rather than continuing to back yourself into a
corner.

You're wrong. Admit it and move on.

about what? Rod made the claim that UV does not pass thru glass. pick on
him- or is he too much for you to handle?

 

[Phil Allison]

"felix_unger"

Rod made the claim that UV does not pass thru glass.

FFS - "glass " is a whole class of materials - not ONE material.

Ordinary "soda glass" heavily attenuates UV radiation.

But the tubes used in fluoro and CFL tubes are egg shell thin - so it is not
100%.

The tubes used in "bug zappers" use quartz glass to eliminate this
attenuation.

In any case, bright SUN on generates about 100 to 1000 times more UV that
any fluoro tube.



.... Phil

 

[felix_unger]

"felix_unger"


FFS - "glass " is a whole class of materials - not ONE material.

Ordinary "soda glass" heavily attenuates UV radiation.

But the tubes used in fluoro and CFL tubes are egg shell thin - so it is not
100%.

The tubes used in "bug zappers" use quartz glass to eliminate this
attenuation.

and window glass passes UV which is why curtains and carpets fade

In any case, bright SUN on generates about 100 to 1000 times more UV that
any fluoro tube.

so?


... Phil

 

[Damian]

No they don’t. UV doesn’t get thru glass.

Whether the majority of cfls emit harmful amount of UVs to us, is something
I'm not sure yet.
That need some reading of research papers.

Nope, because UV doesn’t get thru glass.

Come on man. You should know that's incorrect. I know you are no big in
physics, but you still suppose to have chemistry experties, which should
give you enough background knowledge on that.
We have sunglasses(not just glasses) for a very good reason.

 

[Damian]

"felix_unger"



FFS - "glass " is a whole class of materials - not ONE material.

Ordinary "soda glass" heavily attenuates UV radiation.

But the tubes used in fluoro and CFL tubes are egg shell thin - so it is
not 100%.

The tubes used in "bug zappers" use quartz glass to eliminate this
attenuation.

In any case, bright SUN on generates about 100 to 1000 times more UV
that any fluoro tube.

Yes, but most of you 'black' guys can handle it. ;-)
It's mostly in Australia we should be worried about this UV sun thing. I
believe most of the habitable other areas of the world is ok.
I believe the darker your skin, the better protection you might have against
UV in under Australian sun.
I rarely hear aborigenes getting skin cancer, by that I meant the real
Aborigenes. Not the 5% Aborigenes.

 

[Damian]

which goes thru the glass


about what? Rod made the claim that UV does not pass thru glass. pick on
him- or is he too much for you to handle?

Trevor is scared of Rod. ;-))
BTW, Rod is dead wrong, even in generic sense of 'glass'.
But, you won't get him to admit that. He would rather die. )

 

[Phil Allison]

"felix_unger"

and window glass passes UV which is why curtains and carpets fade

** Wrong.

The sun is relentless and has massive UV output.

so?

** UV harm done to humans is from the sun, rather than fluoros - fuckhead.

Wot a dumb cretin.




.... Phil

 

[felix_unger]

"felix_unger"

** Wrong.

The sun is relentless and has massive UV output.

yes I know, and it passes thru window glass and fades carpet and drapes,
as I said. what is your problem?

** UV harm done to humans is from the sun, rather than fluoros - fuckhead.

I know - fuckhead

a dumb cretin.

... Phil

yes you are

 

[felix_unger]

Trevor is scared of Rod. ;-))
BTW, Rod is dead wrong, even in generic sense of 'glass'.
But, you won't get him to admit that. He would rather die. )

nothing is more sure than that, lol!

 

[yaputya]

Yes, but most of you 'black' guys can handle it. ;-)
It's mostly in Australia we should be worried about this UV sun thing. I believe most of the habitable other areas of the world is
ok.

The UV exposure index in Australia is no different to other parts of the world with
the same conditions (latitude, altitude, clouds etc.)
http://www.who.int/uv/intersunprogramme/activities/uv_index/en/index3.html
BTW We have all seen media beatups about the Antarctic ozone layer "hole",
suggesting that it massively increases UV in Australia and is to blame for skin cancer rates.
That is simply not true, as this link explains:
http://www.met.sjsu.edu/~cordero/ozone/MSIE_paper.pdf

I believe the darker your skin, the better protection you might have against UV in under Australian sun.

That is true for any where in the world, not just Australia.
All fair skinned people are at increased risk if they move closer to the equator,
as happened when the Poms moved here.

I rarely hear aborigenes getting skin cancer, by that I meant the real Aborigenes. Not the 5% Aborigenes.

The skin cancer mortality rate for aborigines is about a quarter of the non- aborigines.
But aborigines die much younger anyway.

On another topic, has anyone used BUNGARD photo-resist pcbs and what is a
cheap UV source to expose with? (Other than the Sun.) Aldi had a cheap UV steriliser
a few years ago which worked with UV EPROMs, but it's too small for PCBs
Anyone tried cold cathode UV tubes?

 

[Damian]

It was mandated anyway.


You're wrong, as always.

I have couple of incandescents in the house installed by(not me), in areas
where I rarely switch them on.
I haven't had the bulb police showing up and kicking my arse over it yet.
And the local Chinese shops and major warehouses still have them.

I get them for free and they last fine. Haven't had to replace any of
them.



Nope, mine didn’t. Didn’t cost a cent.

Are they free in Antarctica??!!

In spades when you get them for free.

Are they free in Antarctica??!!

 

[Damian]

No they don’t. UV doesn’t get thru glass.

Wrong as always.
average glass blocks UVB. But, cfl's emit both UVA & UVB.

Nope, because UV doesn’t get thru glass.

Wrong as always.
average glass blocks UVB. But, cfl's emit both UVA & UVB.

 

[felix_unger]

I have couple of incandescents in the house installed by(not me), in areas
where I rarely switch them on.

I still have a box full

I haven't had the bulb police showing up and kicking my arse over it yet.

now that you've outed yourself on usenet expect a SWAT team anytime soon..

And the local Chinese shops and major warehouses still have them.

eBay too

 

[Damian]

I still have a box full


now that you've outed yourself on usenet expect a SWAT team anytime soon..

Crap! Why don't I think before I talk?!! ;-)

eBay too

Shouldn't it be illegal to sell them, like tobacco and alcohol?!
BTW, Rod is a home brewer.
I would dob in the bastard, if I know where he live. )

 

[SG1]

Crap! Why don't I think before I talk?!! ;-)


Shouldn't it be illegal to sell them, like tobacco and alcohol?!
BTW, Rod is a home brewer.
I would dob in the bastard, if I know where he live. )

Try the Weed Capital of NSW

 

[felix_unger]

Crap! Why don't I think before I talk?!! ;-)

Shouldn't it be illegal to sell them,

I think it is. but ppl who sell on ebay don't care. if there's any
hassle they just close their account and start a new one.

like tobacco and alcohol?!
BTW, Rod

is laying low until we stop talking about this..

is a home brewer.
I would dob in the bastard, if I know where he live. )

I think it's 260 miles past the black stump, then turn right..

 

[Rod Speed]

That must be why solariums are not dangerous then..

They don’t do the UV thru glass, fuckwit.

 

[felix_unger]

They don’t do the UV thru glass, fuckwit.

so what are those fluro tubes made of then? stone? (fuckwit)

 

[Phil Allison]

"felix_unger"

eBay too

** I figured some people would get their GLS lamps on Ebay.

Technically that makes YOU the importer and so breaking the law in each
Australian state.



..... Phil