Supplemental UV
- Thread starter canadian1969
- Start date
Positivity
Well-Known Member
Uh oh...lol
90% at 50c?
90% at 50c?
stardustsailor
Well-Known Member
Ooopppsss ...
Not so good thermal ..."behaviour" of the semiconductor ....
Almost as worse as cheap reds ...
Thank you for the tip,Guod !
Cheers !
Not so good thermal ..."behaviour" of the semiconductor ....
Almost as worse as cheap reds ...
Thank you for the tip,Guod !
Cheers !
stardustsailor
Well-Known Member
The second one goes from 100% to almost ~35% @100°C !!!!
(And the first is ~95-97 % @50C ...
)
stardustsailor
Well-Known Member
UV leds have a true problem ...
Semiconductor material thermal stability ...
( And guess which semiconductor material is one of the 'best' for UV leds ?
Who said diamonds are only for ladies ? )
Cheers .
Semiconductor material thermal stability ...
( And guess which semiconductor material is one of the 'best' for UV leds ?
Who said diamonds are only for ladies ? )
Cheers .
stardustsailor
Well-Known Member
Probably they 've a bunch full of reasons ,for choosing a cement/brick construction with large windows,
rather than a steel ' frame' , ' layered' with transparent glass/polymer panels ...
Cheers.
stardustsailor
Well-Known Member
Red&Blue ......+ WarmWhite ......... + UV ......
+ DeutschTech & Design !
No need for anything else ,really ....
Cheers !
+ DeutschTech & Design !
No need for anything else ,really ....
Cheers !
canadian1969
Well-Known Member
SnowDragon came back with a COB price of $350 for a 50 watt module running 360nm. I have asked for smaller COB wattage pricing.
Positivity
Well-Known Member
stardustsailor
Well-Known Member
http://users.ntua.gr/mmakro/UVsource-measurem.pdf
Nice collection of "plant damage " action spectras (especially for UV)
http://i115srv2.vu-wien.ac.at/uv/actionspectra/as_plantdamage/plantdamage.htm
A a really good handbook about light measurements ,in general ...
Very good .
http://irtel.uni-mannheim.de/lehre/seminar-psychophysik/artikel/Alex_Ryer_Light_Measurement_Handbook.pdf
canadian1969
Well-Known Member
great stuff, thanks
canadian1969
Well-Known Member
http://www.vaughns-1-pagers.com/science/uv-spectrum.htm
410 is plain old voilet
LED panel manufacturers are selling the 385-410 range as UV... waste of money. As I suspect the "far reds" are as well. The first several posts in this thread outline what UV is and how it should be used.
410 is plain old voilet
LED panel manufacturers are selling the 385-410 range as UV... waste of money. As I suspect the "far reds" are as well. The first several posts in this thread outline what UV is and how it should be used.