[rollei_list] Re: OT: Light bulb for slide viewer
- From: James Richard Tyrer <tyrerj@xxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Thu, 19 Aug 2010 11:20:22 -0700
On 08/18/10 13:48, Eric Goldstein wrote:
James, you are forgetting the premise of my comment... that ideally
you want more light in these viewers. I know that the halogen
replacements I use in my 50s/60s stereo viewers are substantially
brighter than the original lamps, but they generate more heat, and
only some viewers can handle them.
I'd be interested in knowing of any incandescent lamp that produces
more light and less heat with the same wattage.
The issue with the halogen lamps is not that they have higher Wattage
and produce more heat, it is that the bulb itself gets hotter (higher
temperature) and this can damage the socket.
IIUC, the noble gas (Xenon or Krypton) filled incandescent lamps produce
slightly more and slightly higher temperature light with the same
Wattage. At least they look brighter when used in a flashlight.
The only lamps that can produce more light with less heat are HID and
fluorescent lamps and I don't think that either of them come in small
enough sizes for your application. LED lamps produce more light
(lumens) per Watt but they do not radiate the heat, they get hot and
must be mounted on a heat sink to dissipate the heat.
--
James Tyrer
Linux (mostly) From Scratch
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