light

I'm currently working on a light for a 4x4. The goal is to get a pretty even 900-1000 µmol m-2 s-1 across the whole space running it at 500W or less. The COBs are Vero 29, 3500K 80 and 90 CRI. I took some measurements with an Apogee SQ-520 today. At 40cm distance, I get a bit over 1k in the...

Can someone help me pick out the right driver to do the following. -run 8 x qb 120s -dimmable -ability to top out at 70w per board I am a doofus when it comes to this, so thank you in advance!!!

Yes there are many many forms on here about lighting. I have read many and talked about more in other forms. My question is between $ 150-300 (Canadian) price range, what are the best lights in YOUR opinion ? Please attach the link in your comments so I can see. Much appreciated. Ps. I am...

Hello everyone. First and foremost, thanks for taking the time to read my post. I’ll give everyone a breakdown of my current setup and what I’m moving into.. I’ve never actually used a tent, I have always used a spare room for my setups. I currently have a 400w mh/hps ballast/reflector. I...

Anyone found a light meter application that reach lux grow values? I downloaded nice ones but they only reach 10K lux. As far as I understand I need to aim around 50K lux. Does it a depend on the phone sensor or the application range is not adjust for growing?

Pretty straight forward question. Have a 20x36 inch (5 square feet) area & a 160 W QB. A small area on the sides won't really get adequate light. Am I better off just running the QB or should add in a 130W (true watts) blurple that I have around? I don't want to stress the plants with too...

Hey guys and girls, just wondering if its benificial to remove the fan leaves right at the top of my main colo's as you can see there is multiple small fan leaves between and on top of the cola's blocking light from hitting most of the top cola's as there is so many little budsites right under...

Hello I am a new grower and am currently flowering a Pot Of Gold plant in a 2x4x5' grow tent with single 300w viparspectra v300 model led light I got on Amazon. I was just wondering if anyone can give me a rundown on if this light is going to do me any justice cause I'd like to get a second one...

Hello it is my first grow and I have a question. I trigered flowering outdoor by covering my crop every day with a white/black plastic. I did this because first freeze may happen at the end of september here and I wanted To Be safe. The problem is that it has been for a month now and I begin to...

Hi guys I was just wondering if I should trim some leafs off my plants to let more light in to the center and lower branches? Some people say you should and some people say you shouldn't, does anyone have a good answer for or against? Their just starting their 5th week of flower

Hi folks. I've played about with differing spectrums etc over the past couple years but don't have a PAR meter. I really want one as I'm going to build from scratch but...... The reason the thread title says light meter too is that I'd like to be able to measure from IR down to UV. These will...

Hey guys, So this is my second time growing ever and I've ran into a lot of problems recently. I have two plants and a clone together in a 24x24 growtent in coco. Rn I'm using cfl's but when I started i was using a 1000W LED (actually about 180W). I figured the light would be to big but I...

I have a 400 watt apollo set up and I recently got a new ballast for it because about a month or so ago I woke up and went to check on my tent and my light was off and it should've been on so red flag. I unplugged it and plugged it back in and the light would flicker for a quick sec then go out...

Hey my dudes I'm pretty green to all this I've just started to get into it. I need some help and advice with a few things, if I could get pointed in the right direction or given accurate advice that would be swell. So first off I'm thinking of buying a Gorilla grow tent specifically the 5x9...

Hello, guys. I have a 100x100x200cm tent with a cob 1800w light that draws 340w from the wall. I was wondering what would be the best light to add to it for an optimal yield. Plus, is it at all necessary to do that? I'm told I'd need to reach for at least 600 actual wattage, especially for the...

Hello guys! I am looking into investing in a led grow light panel. However, I am wondering which one I should get to cover this small space. Since the high is only 70cm (27in) I am afraid that the light would hang too low close to the plant. Any recommendations? Which ones should I get? And...

This will be my first attempt at growing Tent size looking at getting 80x80x160cm plan to grow 2-3 plants or more but i imagine that would be a tight squeeze yet to decide on pot size but possibly 5L ? Mainly unsure about light from what I've researched LED seems to be the most electricity...

Makes lamps for growing, which led best suited?

Just wonder what people think about the height of my light. Right now I can't adjust and it's about 35 inches away from my screen. My tent was quite warm that's why I didn't worrie about it before but my temps are down around 22-23c I also have 3 led panels down lower then my big light I will...

Hello everyone, this is my first post although I've been lurking for quite some time. I live in California and in my area we're looking at 14 hours of sunlight at most around May 10 give or take. Im going to be doing a 20 plant op starting from seedlings in about 20-30 gallon holes each in...