A real conundrum. LED lights are killing my plants! Why?

[Groff]

Also, if you think of HPS, the real peak is in the orange zone, going down into the reds, so the proportion of 630 vs 660 is much higher using HPS.

Not saying you're not right J, quite on the contrary, just check the table below... but giving thought to it... one thing is not having excellent results, the other is plant burn! Its not like I'm giving hazardous spectrum to the plants, 630 is well used by the plant.

 

[TaNg]

So why aren't all LED lights 630nm dominant. It's about the ratios, you have to much 630nm and not enough 660nm. My advice to you dude is use lights u have seen tryed and tested.

 

[DWCocha]

i got a cheapo china ebay speacal for you(im upgrading soon ok) 240w 6band... & it looks like it has quite a lot of uv ,ive msgd them asking as it doesn't say & will let you know....i can see similar symptums in my blue mammoth & many other long gone fails, but it could be a lot of things !!...added a 90w prakasa triband(nearly all red)..would that help or too much uv is to much uv ?`got a bad feeling about my super nice deal now !!!

 

[Groff]

So why aren't all LED lights 630nm dominant. It's about the ratios, you have to much 630nm and not enough 660nm. My advice to you dude is use lights u have seen tryed and tested.

Oh no dude, you got me wrong, sorry! What you're saying is totally true!

I'm just trying to figure out the plant burn...

 

[DWCocha]

View attachment 153756i love a bargain meeee

 

[Red eyed c]

One things for sure,to much UV is bad.I think having to much 630 wouldnt burn a plant,it just wouldnt grow a great plant imo.im guessing your led doesn't kick out much UV either in comparison to say the sun,but you may have only 60 or 90 degree lenses that are concentrating the light at the plant and frazzling them a bit.the blackstar uses a mix of 60-90-120 beam angles,maybe the 120 is used on there uv and ir so its not concentrated in a tight beam.but that's just another theory :smokebuds:

 

[Groff]

One things for sure,to much UV is bad.I think having to much 630 wouldnt burn a plant,it just wouldnt grow a great plant imo.im guessing your led doesn't kick out much UV either in comparison to say the sun,but you may have only 60 or 90 degree lenses that are concentrating the light at the plant and frazzling them a bit.but that's just another theory :smokebuds:

Exactly the reasoning in my previous post. And yeah, that 1x 3w UV chip is not near enough to do anything at all...
Good idea Red, but its not the case, the burn happens on multiple plants in different zones.

I think I'll just have to throw the towel in and call this light a huge pile of caca, and buy one off a reputed vendor. I've contacted the LED manufacturer to asked if I can buy LED chips off of him for me to modify, if he does provide them, then I'll make an effort to clear this issue out.

What can I say, I couldn't resist @ 150€ from china to my door...

I wonder what LEDs these guys use...

 

[DWCocha]

One things for sure,to much UV is bad.I think having to much 630 wouldnt burn a plant,it just wouldnt grow a great plant imo.im guessing your led doesn't kick out much UV either in comparison to say the sun,but you may have only 60 or 90 degree lenses that are concentrating the light at the plant and frazzling them a bit.the blackstar uses a mix of 60-90-120 beam angles,maybe the 120 is used on there uv and ir so its not concentrated in a tight beam.but that's just another theory :smokebuds:

so UV can/could burn them if you have a sh1t LED without the right lense angle ??.

& the reason other LED's with similar/same amounts of UV dont/wont burn them,is they have the proper/wider lense angles for the spectrum ??.

 

[Red eyed c]

Exactly the reasoning in my previous post. And yeah, that 1x 3w UV chip is not near enough to do anything at all...
Good idea Red, but its not the case, the burn happens on multiple plants in different zones.

I think I'll just have to throw the towel in and call this light a huge pile of caca, and buy one off a reputed vendor. I've contacted the LED manufacturer to asked if I can buy LED chips off of him for me to modify, if he does provide them, then I'll make an effort to clear this issue out.

What can I say, I couldn't resist @ 150€ from china to my door...

Well mate I think that's the best idea,a proper led from a proper company with a good warrenty :group:

 

[Red eyed c]

so UV can/could burn them if you have a sh1t LED without the right lense angle ??.

& the reason other LED's with similar/same amounts of UV dont/wont burn them,is they have the proper/wider lense angles for the spectrum ??.

That's my theory mate,it may be wrong but it sounds plausible :smokebuds: