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Science Forum Index » Engineering - Lighting Forum » GE's new "High Efficiency Incandescent"...HIR or??
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| Victor Roberts |
 Posted: Mon Mar 05, 2007 11:48 pm |
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On 5 Mar 2007 15:13:49 -0800, "Daniel J. Stern"
<dastern@engin.umich.edu> wrote:
Quote: On Mar 3, 9:00 pm, Victor Roberts wrote:
G-E claim a B50 of 850h @ 14.0v for their HB4/9006 (1000 lm).
G-E claim a B50 of 900h @ 14.0v for their HIR2/9012 (1700 lm - this
lamp is NLA)
Toshiba claim a B50 of 800h @ 14.0v for their HIR2/9012 (1700 lm -
current production)
Other than the HIR aspects (envelope shape & coating, lumens) these
bulbs are essentially identical. Same filament geometry, same power
consumption, same architecture.
But not the same filament.
Mmm...good point. Though the differences are probably small in
absolute scale, considering the specifications for the two lamps'
filament coils are quite close:
HIR2: 1.6mm max diameter, 5.3mm max length,
HB4: 1.6mm max diameter, 5.1mm max length.
In the real world we want the HIR lamp to operate at the
normal input voltage so we modify the filament, usually by
making it longer, so it has higher resistance and draws less
power at the standard power line voltage.
Understood, but I have to wonder what degree of significant filament
alteration is possible within the specs given above. I suppose a
different gauge and pitch might be used.
Filaments are double or triple coils. The dimensions you
gave above are the overall size of the coiled filament and
therefore do not address the diameter and length of the
wire.
--
Vic Roberts
http://www.RobertsResearchInc.com
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| Daniel J. Stern |
| Posted: Tue Mar 06, 2007 2:21 pm |
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On Mar 5, 10:48 pm, Victor Roberts wrote:
Quote: HIR2: 1.6mm max diameter, 5.3mm max length,
HB4: 1.6mm max diameter, 5.1mm max length.
I have to wonder what degree of significant filament
alteration is possible within the specs given above. I suppose a
different gauge and pitch might be used.
Filaments are double or triple coils.
Mmm...HIR2 and HB4 are both single-coil.
DS |
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| Victor Roberts |
| Posted: Tue Mar 06, 2007 7:27 pm |
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On 6 Mar 2007 10:21:35 -0800, "Daniel J. Stern"
<dastern@engin.umich.edu> wrote:
Quote: On Mar 5, 10:48 pm, Victor Roberts wrote:
HIR2: 1.6mm max diameter, 5.3mm max length,
HB4: 1.6mm max diameter, 5.1mm max length.
I have to wonder what degree of significant filament
alteration is possible within the specs given above. I suppose a
different gauge and pitch might be used.
Filaments are double or triple coils.
Mmm...HIR2 and HB4 are both single-coil.
Even if so, the dimensions of the coil do not tell us about
the diameter and length of the wire. Do they have the same
number of turns? I see that coil of the HIR is a bit
longer.
--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
or use e-mail address listed at the Web site.
This information is provided for educational purposes only.
It may not be used in any publication or posted on any Web
site without written permission. |
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