lumens

Hi lads! I was thinking about buying this light for my plants and I am not sure it is a good idea in terms of costs, efficiency, number of plants to grow under one of these, and the rest of questions I might have in this crazy detailed and confusing importance and complexity of grow lights for...

Hi lads! I was thinking about buying this light for my plants and I am not sure it is a good idea in terms of costs, efficiency, number of plants to grow under one of these, and the rest of questions I might have in this crazy detailed and confusing importance and complexity of grow lights for...

Hey! I’m reading that you should have at least 7500 lumens per sq ft to really take advantage of CO2 enrichment. In a 4x4 area, a 1000w HPS has sufficient lumens (9375 lumens per sq ft) but not a 630w CMH which has less than half as many lumens (4125 lumens per sq ft) even though both lights are...

I recently got 2 LED Glass Tubes. These tubes produce 2400 Lumens while running at 24W/230V with a CRI >=80 and 6500K. Will a combination of 6 of these bulbs be enough for a successful grow from seed to harvest? Will a combination of different LED Glass tubes work better? For instance a...

The Brief: They state: 3.03μmol/J This calculates to: 80% efficiency The datasheet calculates: 67.35% efficiency What's the skinny: the difference is from the losses on the phosphor The Claim: LM301H 6500K flux data: LM301H 6500K testing parameters: Digitized LM301H 6500K SPD...

Hello, second time grower here Due to phenotype, the 2 plants on the left of my tent are much shorter and much bushier. as a result i feel like alot of bud sites are being covered by fan leaves and I wanted to know if its okay to take alot of them away. Here is a pic here is a pic of left...

Hello! All my supplies are almost gathered for my next grow. This question is about choice of light for just starting out. I ordered a 2' 4 bulb T5 HO fixture with 6500k bulbs. It states lumens per bulb is 2000, and claim that gives me 8,000 total lumens. Idk about that, do lumens add per bulb...

So my grow is about 35 days in. I've had some issues with finding the right height to hang my light. At first it was low and I had some bleaching so I raised them about 5 inches. But my growth has been really slow for the past week or so. I thought it was from the nutes at first but once I...

I am a first-time grower but experienced greenhouse and farmer I have done a lot of experiments with lighting reading the meters and see where everything is at everybody argues about everything but I can go out in the greenhouse and read anything better in a cloudy day in my Greenhouse then I...

I am a first-time grower but experienced greenhouse and farmer I have done a lot of experiments with lighting reading the meters and see where everything is at everybody argues about everything but I can go out in the greenhouse and read anything better in a cloudy day in my Greenhouse then I...

that is the question.. what is the answer.. if someone can make me a build list ill gladly pay you in paypal or btc. or what ever alt coin you wanna trade in.. money for work, I say.

Hey everyone, this is my first post and first grow, so I'll try to be as informative as possible. I've previously grown quite a few types of plant; fruit, vegetables flowers etc. outdoors so I have a basic understanding of growing, but this is my first Marijuana grow, and my first indoor grow...

In the spirit of all this DIY cob stuff I apparently fell into, I became curious what else I could do. Google to the rescue. I found this gem of a post on another forum (non growing forum) by a poster named Hoppy. Take a gander and let me know what you think. I ordered the lux meter and...

Hi there. About a year back I got a full spectrum lamp that mimics natural light, as it's supposed to be helpful for Winter depression. I'm planning on doing a very small grow soon--1 to 3 plants, most likely just one or two--for fun. Would this kind of lamp be good to use, or is it better to go...

1650lumn. Cfl lights my grow are has a.c. but I know Led lights are were a lot of inside growers are using. But will this style bulb work as well, better, or at all. (750 lumn. Daylight/6500k led.) I know the cfl have more lumens but if I got the equivalent in led. Or are complete rubbish...

I'm broke and can only afford store bought lights. At the moment I have 10 1650lumn. Cfl lights my grow are has a.c. but I know Led lights are were a lot of inside growers are using. But will this style bulb work as well, better, or at all. (750 lumn. Daylight/6500k led.) I know the cfl have...

I know the PPFD formula which is Input power [W] x efficiency [dimensionless quantity] = radiant power [W] luminous flux [lm] / LER (luminous efficiency of radiation) [lm/W] = radiant power [W] radiant power [w] x QER (quantum efficiency of radiation) [µmol/J] = photon flux [µmol/s] photon flux...

I have a grow box about 3' x 1.5' x 2.5'. I've been using Philips four 42W (true watts) daylight I believe. I've had little success, five attempted grows, and only two of them I got only a little bit of bud. The plants seem to get to a certain size or stage and then just stop growing, the...

Hey guys was wondering if anyone has experienced using Mars Hydro LED 144x5 reflector (or any other ones) and how they worked out for the girls

DNA Genetics Sour Tangie:joint: is what i have my eyes on 80% Tangie (sativa) 20% East Coast Sour Diesel (indica), Known for growing tall! However ill be training them from an early stage and also be setting them into flowering when they're half way up my thigh to ensure theres no over growth...