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05-29-2020 01:59 AM
Mayhem
Quote: Originally Posted by ciarlatano View Post
https://www.hortidaily.com/article/9...ight-spectrum/

The problem is.....what are these cheap purple lights putting out?
There is UV A,B and C

UV A = Sun light = promotes growth in a system. = Bad (some UV cheap Chinese leds do give off a tiny , tiny amount of UV-A light (i cannot go into to much detail but i have tested the spectral wave length of many UV Leds and yes some are not good). All i can say is just because some thing is expensive buy a big name maker doesn't make it good.

UV-B = Its not to bad and doesn't promote growth

UV-C = Germicide Kills off alga by imploding the alga at a Cell level, this is dangerous. Also can damage Plastic, Coolants and many other things. Don't mess with this type of UV and is part of our system for water cleansing. DO NOT LOOK AT UV-C IT CAN BLIND YOU.

UV-C LEDs are rated as 275 nm (270 - 280 nm)

When dealing with leds all i can say its a rabbit hole.
05-28-2020 04:30 PM
skupples thanks for further iterating on that


you would probably just wanna buy an actual HVAC UV bulb, if you really wanted to go for the effect.

and i'm gonna guess those are about as expensive as they've ever been, right now. This very instant. COVID19 has been a boon for any HVAC company with an existing bulb hustle game going. (i'd assume that's most of them these days, and yes they do actually work, if you get enough of them going. You're better off doing it yourself if you have some general know how. We did the before & after tests in our last house & it's legit.)
05-28-2020 11:30 AM
ciarlatano
Quote: Originally Posted by skupples View Post
UV would kill bio, not promote it. (if your UV cathodes are even strong enough to do anything at all)

not to mention, most of us are using LEDs n such now, no the old school cathode UV tube.
The thing is, many of these LEDs are nothing more than purple lights, and don't have any appreciable UV output. At that point, it's not UV, it's just a purple colored light.

So, the problem with the question is you need to know what light specifically is being referenced, and what the actual output of that light is.

And I feel like it's 2010 all over again talking about UV.....
05-28-2020 09:05 AM
skupples UV would kill bio, not promote it. (if your UV cathodes are even strong enough to do anything at all)

not to mention, most of us are using LEDs n such now, no the old school cathode UV tube.
05-28-2020 09:04 AM
ciarlatano
Quote: Originally Posted by Shawnb99 View Post
@Mayhem should be able to educate us on this. I would assume they know everything there is to know about fluids and what causes growth or not.

That is a good question though. Wonder if other RGB or LED's cause cause growth. Most info I can find just mentions sunlight and not what part of the spectrum.
https://www.hortidaily.com/article/9...ight-spectrum/

The problem is.....what are these cheap purple lights putting out?
05-28-2020 08:51 AM
Shawnb99
Quote: Originally Posted by kevindd992002 View Post
I see. It won't kill bacteria/virus but will it promote growth? Or is it just neutral and do nothing except for potentially "burning" plastic tubing?

Sent from my SM-G955F using Tapatalk

@Mayhem should be able to educate us on this. I would assume they know everything there is to know about fluids and what causes growth or not.

That is a good question though. Wonder if other RGB or LED's cause cause growth. Most info I can find just mentions sunlight and not what part of the spectrum.
05-28-2020 08:32 AM
ciarlatano
Quote: Originally Posted by kevindd992002 View Post
I see. It won't kill bacteria/virus but will it promote growth? Or is it just neutral and do nothing except for potentially "burning" plastic tubing?

Sent from my SM-G955F using Tapatalk
No idea. On one hand it's light, so one would assume yes. On the other hand it is supposedly UV....but who knows at what part of the spectrum?
05-28-2020 07:42 AM
Mayhem
Quote: Originally Posted by kevindd992002 View Post
Does UV light strips also promote growth?



Any clues as to what the issue really is? I've been planning to change the Pastel coolant on my system with coolant from bottles that I have from a year ago and I was hoping those are not affected.
Nothing atm. trying to forfill other orders for larger companies and not had time to look into it fully. ATM as said staff are furlong this has left me with no time whats so ever. Plus right at this moment in time in a canny bit of pain down my right-hand side. (p.s this is not an excuse just how things stand right at this moment in time and id rather be honest with everyone).
05-28-2020 07:08 AM
kevindd992002
Quote: Originally Posted by ciarlatano View Post
Eh....maybe. it's UV-C that is actually antibacterial/antiviral. And that also happens to be very dangerous to your eyes and skin, so these UV LEDs are not operating in that range of UV.
I see. It won't kill bacteria/virus but will it promote growth? Or is it just neutral and do nothing except for potentially "burning" plastic tubing?

Sent from my SM-G955F using Tapatalk
05-28-2020 07:04 AM
Shawnb99
Quote: Originally Posted by ciarlatano View Post
Eh....maybe. it's UV-C that is actually antibacterial/antiviral. And that also happens to be very dangerous to your eyes and skin, so these UV LEDs are not operating in that range of UV.

My bad then. I just google lead me wrong [emoji3525]
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