More than Double Your Yields with this Tool!


What's up cannabis Growers and welcome back to GreenBox Grown.  In today's video I'm going to show you guys my new light meter and how to properly distance you're a grow light for maximum yields. Now before we get started I’d like to mention as always to check out our MERCH online at under the merch and smoke section. And also don't forget to check out our link Down Below in the description to visit our patreon page where you can sign up for 1-on-1 grow advice from myself. 

Basically I'll be guiding you each day from seed to harvest so you can learn as you grow without making any mistakes and so you can get the best results possible. Alright now that you guys know what we're doing in today's video, let's get started!

Alright guy said before we start testing different lights out with this meter, I want to give you a quick overview of it. What this region is Lux as well as FC which stands for foot candles. You don't really need to use that I just use the Lux reading, and these meters are different than par meters. So foremost Lux meters they don't work well with LED lights, but this one happens to work well with them so I'll be using it with LED lights. 

Lux meters are perfect for HPS and metal halide bulbs and stuff like that and other incandescent lights, but for LEDs you're supposed to use a par meter as a highly recommended. But today I'll be using this doctor meter Lux reader because it does work with the LEDs, and all you have to do is take this cap off once you have the reader turned on. Then placed is under the light source to get A reading of how strong it is. I'll give you guys a little more details on that once we're outside under the lights, but just wanted to give you guys a quick overview of what this look like. 

Alright so now we're going to hook up a 900 watt viparspectra LED, a Mars Hydro 300w LED, and then a Mars Hydro 480 watt from the reflector-series. And I'm going to give you guys an idea of how quickly the power of the light dissipates as you go away from it or get further away from it. And I'll also show you how large of a footprint the lights have and how the power of the light differentiates from the different corners and as you go from the middle to the outside. All right now it's hope outside to check that out.

Okay we are now outside in the grow room, and you can see I've got this is the 900-watt viparspectra LED. And it is exactly 24 in from the canopy of these autoflowers down below. So let's get in a little closer come on in the show you guys some readings with a lux meter and show you what the readings are at the canopy as well as the outskirts of the footprint. And to show you a little closer how powerful the light really is.

 All right here's the meter a little bit more up close, it's going to be in Lux as that's going to be the unit of measurement. And for vegetation the range you're going to To want to be looking for. The minimum is about 40000 in the matches about 70,000 says somewhere in the middle there like 55 is pretty good for veg not really for seedling. And then once you're in flower you're going to want to be in the range of 60 to 85000.  And that you don't want to be at 85000 as that's going to be a little too much and it's going to be full stature ation for your plan so that probably will stress them out, especially for the more sensitive strains. But you will want to be somewhere like 75000 or maybe a little higher so I'm going to turn this baby on and get a few readings for you guys.

 So I'm going to be reading in the time to 100 range so right here we're about 30000 blocks. And again this is a lux reader so this is better for incandescent like HPS lights not as good for LED but this one does work. But this one probably will give slightly less readings cuz it's probably not picking up all the lighting. About 35,000 likes here and as you get closer here it's about 50,000 and now 40right there. This plant on the outskirts is a little bit lower it's at 25, 21, 22. You can see out here it's still at 20 so that's kind of nice as it's got a large footprint  and it gets lower the further out here we go but all the way towards the edge of the grow room it’s still at about 10K so it’s not that bad.

. Message of the grow room almost 12,000, 11.3. And then if you go all the way up you're at like 120, 130000. So pretty good light the power doesn't dissipate to quickly and it doesn't get hot either which is nice. Right now it's just on the bed switch but with the blue switch that boost the readings. So now it's over 35 here, about 37 but not too much of a difference. So one quick thing I left out so with the readings here at the canopy, like right here at that 27, 26.6. I'm saying though it's more like 35 because this is an LED, so it’s not going to pick up all of the light range but it is still at like 25,000 down here.

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That is why I'm saying the readings are a little higher than 1 is showing on here because this is a lux meter and you really need a par meter to get the full spectrum of light showing up, but close enough for me and it's adding 5 to 10,000 is a good estimate. Here we are in my casa  and I've got the 480 green 1 on the left and then the 300 watt by Mars Hydro. I'm going to be testing out the 480 watt. So I'm going to turn on the switch only for right now and give her a little test.

 All right, so you can see this light is a little more purple than the viparspectra that's just kind of the Mars Hydro trait. So right here at about 1 foot,  we are at 24000, 25 almost. Down here at about 2 feet we are at 10000, so it dissipates pretty quickly. Right up close, now what is nice as this is built out of 2 LED screens, reflector screens like this, so it does spread out the footprint a lot more. But yeah I mean this light is a lot weaker than the viparspectra I had. We're right here I'm at 23000 and these readings are a little low because these isn't picking up all the light, but this is 15000 right here, 14. 

All right now let's check it out with the bloom switch on as well.  So that bumped it up a little bit we're at 21, almost 22,000 right here. Max is like a hundred thousand. 130,000 about right here.   All right let's check out the Mars 300 now.   All right so here we go, this one is less purple, so up close about a hundred and thirty thousand again right here. And that's without the adjustment. And we're at about 80,000 19 or 20.  So this baby  really puts off some good light, it's just you need to stay really close to it. We're at like 16 out here, 12000 10000, so pretty good range.

 I think this meter is working better with this one too since it's not as purple as the other light. All right row or said that is exactly how you would use your car or Lux meter to optimize your lights, and now you can see exactly how useful this tool is for increase in yield.  Because it's going to allow you to see exactly how much energy your lies putting off and where that light is maxed out or OptimEyes, so you can adjust its height and plants location so they are getting those Optimum ranges like I was talking about earlier.  

 For veg the range is 40000 to 70000 lux, and then for flour it's 60 to 85000 and you want to stay in that range you don't want to go to the extreme ends. Because it'll be too much or too little for your plants.  Again these products are available on the store, under the starter kits tab.  Just hit the Grow Lights button and you'll see this listed there with some other options for par meters as well as Lux meters. This tool is also great for determining your footprint or your grow lights footprint so you know the perimeter of where you lights can be and the different ranges or different amounts of life that they will be receiving at that perimeter.

 Alright guys, that concludes my review and showing of how to use a lux meter to optimize and maximize the use of your grow light. If you guys enjoy the video please give it a thumbs up and comment below with your feedback.   And also don't forget to subscribe to our Channel and to turn on notifications for updates on my latest grows. As always thank you guys for watching and until next time…

Happy Growing!!!
Dylan @ GreenBox Grown