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Hey. Are you using 4000K Citizen 048? Light seems kinda blue, My set up is 5x 048 4000K and I'm about to flip for the first time under this fixture, How would you compare the 3590 vs 048? I like the structure of your plants, it would suit me really well right now...

That makes lots of sense as I severely damaged the root system when transplanting.

A study someone published here before stated cannabis maximum photosynthesising at 1500 PPFD with temp 30° C. In practice I guess growers have problems with that amount of light. Concerning plant size and the ideal PPFD, good question...

It is for sure, but from what I read in this forum it seems people prefer to play with the distance. I'm trying to figure out why people don't just dim the lights.

Hey. This topic is old but it's the subject that matters. My plants are suffering from light bleaching. What would be preferable, increasing the distance of the Cob fixture or dimming the lights? By dimming the lights I would keep total coverage since my space is small and save on the...

To conclude this topic, I wanted to share what really happened. I realised that the cause for my plants to stop growing, yellowing and curving down was mainly related to too much light. I'm using COBs for the first time, this lights are more intense than an HPS and I had them 10" from my plants...

My plants are staying inside a steel cabinet, if I knew I would have this low temps I would have built a wood cabinet instead for better thermal isolation. I have some new clones ready to go in, if same happens it means the shock is too significant for plants to handle, no matter strain. The...

One week has passed and new growth is now slowly developing, however all old growth is slowly yellowing and dying from bottom to top. It's very unlikely it is nitrogen deficiency as I'm feeding and using rich soil. In all plants that suffered the shock same is happening. Temps have been...

Hey. Thanks all. If the point of vegging 24h is to get constant warmer temps I guess it would be wiser to get an oil radiator, it's more efficient producing heat and I wouldn't risk stressing my plants due light schedule. Today temps have raised to 70F-72F but plants didn't show any signs of...

It works at a distance of 5 inches. Less than that it will hardly burn any leaves but you lose light spread. More than that and you lose light intensity.

From my understanding the 3000k have a lower PAR, even if we consider the sweeter spectrum curve, the 3500k might be a safer bet. I got the 4000k since I need the lights to veg and flower.

I was lost in the same dilemma when I had to order my 1212s. From the research I did in this forum, it seems it's not consensual among users, mainly because the differences are not significant, making it hard to say something conclusive. Maybe a good approach would be to spread the eggs, buying...

Hey all, I'm struggling to keep my plants happy. My plants have been healthy and vegging for 3 weeks at constant 75F / 24C under 40W CFL, then I had to move them to my backyard shed where I installed a steel cabinet which I'm using as tent. Right after the change, the plants immediatly started...

Hey guys, thanks for the help. I didn't add a 10k resistor after the pot, if not dimmed is it equivalent to open circuit, or the 10k is the internal resistance of the driver ? I don't need more dimming than I actually have, but would like to understand what's going on. I still don't get how...

Hi, I just built my first cob setup, 5x citizen 1212 4000K on a MW 240-C1400B. The driver spreadsheet says it operates from 700mA up to 1400mA. Great, so I thought, if completly dimmed (100k potentiometer), the lights will pull around 125W from the wall as they will be operating at 700mA, 5...

I thought they would fry in seconds running at 4600mA. Are you referring to the 048-1212? So based in that information I conclude is ridiculous the amount of stress and caution people put in case of fan failure or overheat when building the lights. This things are much more reliable the I...

Sorry I didn't get what you are saying. What is lm data and in what aspect are the cobs rated in the tens of thousands of hours? You mean, running at 140C?

120mm pin fin in Europe needed. Any deals I might be missing? So far I didn't find them for sale in EU. I found a 111mm for 25€, no way I'm paying that.

In US northerngrowlights.com is selling the 120mm at 14.5$, I would buy for that price... In Europe, so far the best I found is 111mm pin fin for 25€ ~ 26$. The Alpine 11 GT (80mm) costs 7.5$ here on the local store. I will give it another day to see if there are some deals outhere I might be...

No I didn't. I thought about it, but it would increase the cost of cooling. How much are you paying for those pin fin? So far in Europe I didn't find them. Good thing about Alpines is they help to move air, which is very beneficial for small and crowded space like mine. (Me saying by intuition.)