research
 Patents
 Books
 Literature
 Articles
 Timeline
 Auction Archive

about
 About this site
 Wanted to buy

bulb gallery

Incandescent:
C
carbon
WD
drawn tungsten
WC
coiled tungsten
WM
mini tungsten
WS
pressed tung.
FG
figural bulbs
XL
christmas
XS
christmas sets
T
tantalum

Discharge:
NE
neon lamps
AR
argon lamps
XE
xenon lamps
MA
mercury
MC
fluorescent
MS
special mercury

Hardware:
F
fuses
FX
fixtures
PF
plugs & fittings
SA
sockets
SW
switches

tube gallery

 X-ray
 Geissler
 Crookes
 Radio
 Box art

museum pics

 Dr. Hugh Hicks
 
Fort Myers, FL.
 S.Slabyhoudek

links

 Related links
 Submit a link

 

Author Topic: Just for fun  (Read 15600 times)

Offline mr_big

  • Sr. Member
  • ***
  • Posts: 84
Just for fun
« on: October 21, 2005, 03:51:04 pm »
What would happen if you dipped just the tube portion of a compact fluorescent bulb into ice water

Offline Mónico González

  • Hero Member
  • ****
  • Posts: 146
  • Philips HP-80w Mercury Lamp
    • Mis Bombillas, peque?o museo virtual de la l?mpara el?ctrica.
Re: Just for fun
« Reply #1 on: October 21, 2005, 07:40:51 pm »
If the tube cracks in any point, just the water (I guess) will go sucked into the tube, where almost instantly will become solid ice, due to the reduced pressure within it.
This would happen, of course, if the water were at near 0? C.
I've seen these same phenomenon in mineral gasified (soda) water bottles that have been into the freezer at 0? C.
When the bottle are tight closed, the inner pressure (about 2 atm.) does not allow the water could be frozen, but when the bottle are opened, its inner pressure equals those of the outer atmosphere, giving as a result that the water begins to cristalyze until the whole mass are turned to a solid block of ice.
But please, if I'm wrong, please, tell me.
Regards.
« Last Edit: October 21, 2005, 07:46:36 pm by M?nico Gonz?lez »

Offline Zelandeth

  • Sr. Member
  • ***
  • Posts: 74
  • Cold Philips SOX 35W
    • Zel's Lair - an assorted grab bag of lighting information, automotive mayhem, and anything else I remember to upload
Re: Just for fun
« Reply #2 on: October 21, 2005, 08:16:42 pm »
Provided the tube didn't crack, the light output would just drop appreciably.  Other than that I doubt that there would be anything particularly spectacular to observe.

Offline mr_big

  • Sr. Member
  • ***
  • Posts: 84
Re: Just for fun
« Reply #3 on: October 24, 2005, 03:39:50 pm »
what about touching an ice cube to the glass

Offline Zelandeth

  • Sr. Member
  • ***
  • Posts: 74
  • Cold Philips SOX 35W
    • Zel's Lair - an assorted grab bag of lighting information, automotive mayhem, and anything else I remember to upload
Re: Just for fun
« Reply #4 on: October 25, 2005, 04:09:54 pm »
Depends on a few variables.  Temperature of the glass, how high a thermal expansion coefficient it has, and how much it can flex without breaking.

If the lamp was cold, 99.9% chance nothign would happen.

If the lamp was hot, it's possible it would crack, CFL's don't run terribly hot though, so it'd probably survive even then.

Offline pSlawinski

  • Sr. Member
  • ***
  • Posts: 91
  • Westinghouse Lamps
    • Metal-Halide.net
Re: Just for fun
« Reply #5 on: October 25, 2005, 09:43:20 pm »
I can say from experience that the tube will likely not crack.  I took one of those air dusters filled with a liquid propellent and sprayed the liquid on a small portion of the tube and all that happened is taht the spot where the tube was sparayed got slightly dim.