A
Adam Aglionby
- Jan 1, 1970
- 0
Adam Aglionby said:
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.
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.
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"?
Victor Roberts said:Well, have you filed the patent application