par

Found it a while back but forgot it. I'm looking for a site that has a calculator where you can put in the ppfd of your light and what height you want and it gives you said reading. Does anyone know of this? Thanks

So I have a question for someone smarter than me. I am currently running 2 spider farmer sf2000 lights in my 4x3 grow room, and my good friend just gifted me a Phlizon PHGD-3000 LED COB light. I was looking at the PAR and PPFD values and it seems according to Phlizon, that the light I was gifted...

What’s up RIU?!Does anyone have these?? I currently have (3) p1500’s and was just wondering if these were better with the Samsung/meanwell and if you recommend them over the pro 1500’s. Thanks

I’ve done some pretty good research on light coverage, whether that be during veg, where the spread seems to be more forgiving, where as bloom/flower poses a totally different predicament, and this is where my concern/interest hovers. Hanging distances, PAR, full spectrum, blah blah blah blah...

Hey folks. Have a HPS and CMH under the same reflector covering a 3X3. When doing this how is PAR/PPFD figured? Do you add together each lights tested output? I.E.....Say HPS reads 300 by itself and same with CMH. Does that mean you would have 600 PAR if the lights were placed together in...

Hello RIU, We recently added PAR maps for our Redwood VS and 4VS models to our website (also attached here). These are 3500K models and all measurements are taken in a 4'x4' tent. Upcoming Fatty VS PAR map shortly as well. Thanks for your support and have a good day. Regards, Dan

Hey guys, I have my frame and everything measured. Plan is to use x12 CXB3590 COB in a 40"x40" frame. x6 3590 at 3500k and x6 at 5000k. 2 meanwell drivers 320watts at 1.4 amps in a series of 6. It's for my grow tent which is 4'x8'. I've been searching forever and realized it's much cheaper to...

Alrighty then, first post, coming from the other side of the pond (there is my excuse for any spelling errors), where we started this whole lets make weed somewhat legal craze ;) This is a simple PAR test i did to test some cheap alternatives to the more expensive reflective diamond mylar or...

I've been doing a lot of research lately on lighting and came across a study that I would like to share and discuss with everyone. I am in no ways an expert in this stuff, but I am learning everyday. First, though, we need to define some terms so we are all speaking the same language. These...

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...

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...

Hey my dudes I don't know much and so here I am asking a few questions. I'm thinking of purchasing a 5x9 grow tent so first things first I guess that space will technically be reduced because I will have to leave space between the plants and the lights and also the lights them selves away from...

Just posting this light I just made, expect to see a lot more from me in the coming weeks as I get my strawberry banana seeds in and grow em under this bad boy. Plan to run Nectar for the Gods as well :) The goal of this light was to strive for insanely good uniformity to help with canopy...

What par do you guys veg and flower in? I always used a measuring tape to get my lights where they needed to be but recently got a par meter and have been using that to get a more accurate height for the lights. I vegged around 650-700 par and flowering around 1100-1200 par. Because from all the...

I currently run 2 Mars hydro reflector 192s I'm a 5x5 grow tent. I have been using them for about 2 yrs now and I'm rdy to upgrade. I plan on buying a par meter to get my lights the perfect distance from plants but I want to be sure I'm not gonna be overloading my tent with too much light. Ive...

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...

I have spent days reading about lighting...im going to be making a purchase tonight or tmr, and it has come down to a mars hydro 300 (old version). Im wondering is it better to get 2 300's or 1 600 hundred. Im not sure how par is affected with two of them overlapping each other compared to one...

First off of like to thank Victor from Amare Tech. For making this possible & for always providing the best customer service & care possible. About to start mapping. I said I'd do it live so here we go. Setting up now. The Apogee MQ-500 is the Par-Meter being used. First light will be the Pro-9...

I've been a lurker on RIU for a few months, soaking up as much information as I can. During this time frame I've built multiple grow concepts, re-built them, and now have one completed harvest under my belt. I'd like to thank the members of the forum for their contributions to my success...

Hey, Y'all. If this has already been covered please just let me know, but I have been searching and haven't found any threads that really cover this. I want to get some suggestions for a good quantum meter. I have come to realize that measuring PPFD is going to be vital to tuning in my grow and...