Maker Pro
Maker Pro

Glow-Lux After Glow Tube ?

V

Victor Roberts

Jan 1, 1970
0
It almost seems like a good idea, so whats the catch?

http://www.glow-lux.com/

Might be a great idea but the Web site does not address:

Efficacy - if lower than standard lamps then may be a bad idea.

Lumen maintenance of phosphor, under both normal operation and the
"afterglow" part. Yes, I know they say 1 hour of high brightness, but
after 10,000 hours of operation, for example, does the lamp still
provide 1 hour of "high brightness" output? And how much light is
"high brightness"?
 
T

TKM

Jan 1, 1970
0
Adam Aglionby said:
It almost seems like a good idea, so whats the catch?

http://www.glow-lux.com/

Thanks
Adam

There's remarkably little lamp performance information on the web site and
I'm curious as to why they took the color/full-spectrum track. Perhaps the
after-glow operation makes use of some of the new photoluminescent materials
which are supposedly 30-40 times brighter than the old zinc sulfide
phosphors. Plus, the new chemistry materials have a faster charge and
longer discharge times (performance data from the Advanced Lighting
Guidelines, 2001).

If so, the new materials have a (best case) luminance of 480 milicandelas/m2
which equates to roughly 0.5 lumens from a lamp the size of a T8
fluorescent.

There would certainly be some visible light if the power went off; but it's
well below what a dinner-table candle would provide and not enough for
emergency lighting requirements.

Terry McGowan
 
C

Clive Mitchell

Jan 1, 1970
0
There's remarkably little lamp performance information on the web site and
I'm curious as to why they took the color/full-spectrum track. Perhaps the
after-glow operation makes use of some of the new photoluminescent materials
which are supposedly 30-40 times brighter than the old zinc sulfide
phosphors. Plus, the new chemistry materials have a faster charge and
longer discharge times (performance data from the Advanced Lighting
Guidelines, 2001).

If so, the new materials have a (best case) luminance of 480 milicandelas/m2
which equates to roughly 0.5 lumens from a lamp the size of a T8
fluorescent.

There would certainly be some visible light if the power went off; but it's
well below what a dinner-table candle would provide and not enough for
emergency lighting requirements.

What about retrofit photoluminescent reflectors? That way the standard
lamps could be used and the light output from the fixture would still be
relatively high. It would also allow much more of the phosphor to be
used for it's afterglow effect.
 
V

Victor Roberts

Jan 1, 1970
0
What about retrofit photoluminescent reflectors? That way the standard
lamps could be used and the light output from the fixture would still be
relatively high. It would also allow much more of the phosphor to be
used for it's afterglow effect.

Well, have you filed the patent application :)
 
T

TKM

Jan 1, 1970
0
Clive Mitchell said:
What about retrofit photoluminescent reflectors? That way the standard
lamps could be used and the light output from the fixture would still be
relatively high. It would also allow much more of the phosphor to be
used for it's afterglow effect.

That's a good idea. I've got some samples of something called "LUNAplast"
www.lunaplast.com
which uses the new materials. The samples are very sturdy and appear to be
laminated plastic with a relatively high reflectance. They could be
reflectors or even fastened to ceilings and used with indirect lighting
systems.

Ian Ashdown who sometimes posts to this ng reminded me that he wrote an
article a couple of years ago on the subject for the IESNA magazine LD+A. I
found an on-line version at:
http://www.duracorp.com/Articles/GlowAndBehold.htm It includes performance
data.

Terry McGowan
 
J

JM

Jan 1, 1970
0
quoting:
Might be a great idea but the Web site does not address:

Efficacy - if lower than standard lamps then may be a bad idea.

Lumen maintenance of phosphor, under both normal operation and the
"afterglow" part. Yes, I know they say 1 hour of high brightness, but
after 10,000 hours of operation, for example, does the lamp still
provide 1 hour of "high brightness" output? And how much light is
"high brightness"?


I've personally seen one of these in action. They're less efficiant like any
other "full spectrum" lamp. And the afterglow part - I suppose if you had
enough of these in the ceiling, you would get enough light to not get stuck
in total darkness for a half hour. But at $12 per lamp - ouch.
 
C

Clive Mitchell

Jan 1, 1970
0
Victor Roberts said:
Well, have you filed the patent application :)

Having just publicly disclosed my (probably not very original) idea, I
guess I've blown the patent thing. :)

If I'd known what some assholes will patent, I'd have got in first with
my prototype PWM RGB LED colour changer before CK did. But then, given
that there were hoards of LED sign manufacturers with red and green
videowalls just waiting for the blue technology to come of age, it was
hardly considered a patentable concept....
 
Top