LED light and leaves curling down

T

teocomi

Hi all,
I've recently stated growing hot peppers but I'm struggling with my LED grow lights, the configuration is:
 
- 2 x cxb3070 LEDs
- 0.5x0.5x1m grow tent
- CANNA TERRA professional soil
- no nutes so far, just some worm casting and some liquid seaweed fertilizer applied ad foliar spray
- lights are at least 60cm from canopy
- temps don't go above 25º
- the variety is locoto, a hot pepper from bolivia
- watering regularly 1-2 times a week
- using water with neutral PH
 
The plants started to grow well but soon started to show curly leaves, even in new growth and branches. As I took the plants out on my window sill they recovered after a few days. I turned one of the LEDs off and put them in the tent and again the leaves and branches started to curl down again.
It seems quite obvious now that the cause are the LEDs, I read that can happen when the lights are too intense or close, but 60cm should be enough, and I don't have more space to move the LEDs up!
 
Please check out the pics and let me know what you think: http://imgur.com/a/aPaxW
 
 
 
 
 
Supplying the LEDs with a lesser voltage or adding resistance into the circuit will make them less bright
 
What light do they put out-I like 5000-6700K
Might try shorter hours...
But I didn't see you say purple leaves.
 
I've been using LEDS for a LOT of years,red and blue,1 watts.
I built them when Everyone said LEDS sucked!
 
I have no idea what full spectrum means in the adds I read.
Impossible in my opinion.
3500k can't be made from a 5000+k LED.
They don't say they use 2 different LEDS.
 
This is what I go by
 
[SIZE=11pt]380 - 400 nm Start of visible light spectrum. Process of chlorophyll absorption begins. UV protected plastics ideally block out any light below this range.[/SIZE]
 
[SIZE=11pt]400 - 520 nm This range includes violet, blue, and green bands. Peak absorption by chlorophyll occurs, and a strong influence on photosynthesis. (promotes vegetative growth)[/SIZE]
 
[SIZE=11pt]520 - 610 nm This range includes the green, yellow, and orange bands and has less absorption by pigments.[/SIZE]
 
[SIZE=11pt]610 - 720 nm This is the red band. Large amount of absorption by chlorophyll occurs, and most significant influence on photosynthesis. (promotes flowering and budding) The ratio of red (660nm) to far red (730nm) in sunlight is about 1.2:1[/SIZE]
 
[SIZE=11pt]720 - 1000 nm There is little absorption by Chlorophyll here, but Phytochrome uses a nice portion. Flowering and germination is influenced. Near and above the higher end of the band is the Infrared spectrum, which can also be heat and could cause elongation or affect water absorption/transpiration.[/SIZE]
 
[SIZE=11pt]Many of these plant pigments have dual wavelength peaks that can be activated with led light combinations:The visible colors of light from shortest to longest wavelength are: violet, blue, green, yellow, orange, and red. Ultraviolet radiation has a shorter wavelength than the visible violet light. Infrared radiation has a longer wavelength than visible red light. White light is[/SIZE]
 
[SIZE=11pt]Beta-carotene 450nm 480-485nm dual peak[/SIZE]
[SIZE=11pt]chlorophyll a 430nm 662nm dual peak[/SIZE]
[SIZE=11pt]chlorophyll b 453nm 642nm dual peak[/SIZE]
[SIZE=11pt]phycoerythrin 590nm single peak[/SIZE]
[SIZE=11pt]phycocyanin 625nm single peak[/SIZE]
[SIZE=11pt]a mixture of the colors of the visible spectrum. Here is a summary of wavelengths (nm). If you are building your own LED Grow Lights it may be of help when selecting LEDs for your project.[/SIZE]
 
[SIZE=11pt]200 - 280 nm UVC ultraviolet range which is generally harmful to plants. LEDs in this spectrum are non-existant or very expensive.[/SIZE]
 
[SIZE=11pt]280 - 315 nm Includes harmful UVB ultraviolet light which causes plants colors to fade. UV LEDs in this range are now available and coming down in price.[/SIZE]
 
[SIZE=11pt]315 - 380 nm Range of UVA ultraviolet light which is neither harmful nor beneficial to most plants.[/SIZE]
 
[SIZE=11pt]Hope this helps![/SIZE]
 
 
 
 
 
 
 
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