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Thanks so much everyone for your help! How can they just burn out? I ran 3590 Cobs under the same conditions for almost 3 years without any problems! The lm301b are Original Samsung from a trusted source in Germany (LED-TECH). I am running two boards with 2x 480 Watts + 3 boards with 80 Watts...

My lm301b strip board (mothers & clones) started flickering all of a sudden after running it almost 5 months. First, only some LED would stay off and flicker - meanwell more than 50% seem to be dead. I built 4 identical boards and now the second board shows the same symptoms. When I use the...

What driver are you using? Is it 10+10 or 20 Strips per Driver?

Problem appears more on lower and older Leafs. Stems tend to be red also.

Nutrient Make-Up @ the moment is around 900 ppm Terra Flores + 250 ppm Calmag based on low EC Water. PH ranges from 6.2 to 6.5.

Strange thing is brownish spots seem to appear only when two leafs overlap closely !!?

Hey Guys! Could this possibly be a Calmag Deficiency? Temps range from 22 to 26 Celcius and humidity is at 55%. I am growing on Soio with Drippers. Currently Day 29 of flower. I am already using Calmag but probably not enough?

Can I use the new Sonoff IFan Dimmer to dim my LEDs? itead.cc/smart-home/sonoff-ifan02-wifi-smart-ceiling-fan-with-light.html

Thank You linky & Cobkits for your advice!! Especially if my Meter is reading 20% less!!!? I got the Apogee MQ-200 Quantum Meter - which is kind of expensive to me - to get accurate readings and everybody seemed to recommend it to me .... now I am kind of disappointed its not providing accurate...

You are the best! Thank you so much for this great bit of information!!! I didnt know "less is more" and the fact I have to be careful at all! I always thought "the more the better" - at least regarding the amount of light my plants get. I am going to carefully follow your advice and hopefully...

Hej! Today my Apogee MQ-200 Quantum Meter finally arrived. I am completely new to LED and just installed a room with 24 Cree CXB3590 running @50W each with Meanwell Driver ELG-150 (8 pcs). Its a 1 COB per sqft Layout. Now - I really need help which readings I should get @ plant-canopy using...

Hi Folks! I just compared my Cree3590 with my HPS 600W (Adjust a Wing) with my iPhone Luxmeter ( Apogee Quantum Meter is not yet delivered to my door) and made a strange discovery: Cree3590 DB Bin (3500K) Running on Meanwell ELG150 @30cm distance: 6858 Lux HPS Slyvania 600Watt on Lumatek VSG...