Re: Tic-tac sized argon plasma source apparently achieves 140 lumens/watt

I must do a better job proof reading. See below for
corrections.

On Wed, 26 Mar 2008 22:28:07 -0400, Victor Roberts
<xxx@xxxxxxxxxxxxxxxxxxxxx> wrote:

On Tue, 25 Mar 2008 01:46:42 -0700 (PDT), James H
<jamesholloway@xxxxxxxxx> wrote:

Came across this on slashdot:
http://news.zdnet.com/2422-13568_22-192842.html

Unfortunately you have to watch the video for the technical claims but
the salient points seem to be:
The source is a plasma of argon gas at a temperature of 4000K.

There patent implies it is metal halide.

This should say : Their patent implies metal halide.

The source is the size of a tic-tac.

But the arc tube will melt if not run in physical contact
with a much ceramic block or disk also used to couple RF
energy into the arc tube.

This should say in part: "a much larger ceramic block or
disk ..."

The lamp consumes approx. 250W and is envisaged for exterior amenity
use.

But they don't tell us how much additional energy is used by
the RF power supply.

An efficacy of 140 lumens/watt is achieved.

This is apparently the lamp efficacy. The more important
"wall plug" efficacy is not stated.

--
Vic Roberts
http://www.RobertsResearchInc.com
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