What is Reddit's opinion of Dr.meter LX1330B Digital Illuminance Light Meter, 0-200,000 Measurement Range Lux Meter?

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Oh lol. Thats not a light meter. Only use it for soil moisture. I use this meter (they have used versions for a good price) https://www.amazon.com/Dr-Meter-LX1330B-Digital-Illuminance-Light/dp/B005A0ETXY/

Also the iPhone app Photone is fairly accurate if you follow the directions :)

Dr.Meter 1330B-V Digital Illuminance/Light Meter, 0 - 200,000 Lux Luxmeter https://www.amazon.com/dp/B005A0ETXY/ref=cm_sw_r_cp_api_glt_fabc_SHKMH3FS1ZRJ4CJRWPF9?_encoding=UTF8&psc=1

I really love this one. I was kind of disappointed that my whole house was pretty dark, but now I know like specifically how dark (lol)

I recommend Dr.Meter brand lux meter. Cheap on amazon. https://www.amazon.com/Dr-Meter-LX1330B-Digital-Illuminance-Light/dp/B005A0ETXY/ref=mp_s_a_1_3?crid=H3ESAA68HI4W&keywords=dr+meter+lux+meter&qid=1664761202&qu=eyJxc2MiOiIwLjQ0IiwicXNhIjoiMC4yOSIsInFzcCI6IjAuMDAifQ%3D%3D&sprefix=dr+...

They are regulars created from the F6 generation

This is the meter I have

From what I've read anvil is one of the more resilient strains around. Dan does a great job with his breeding program!

Thank you! Yeah, I would imagine this could help you also determine the best location for solar panels! I did it to find hightest light exposure location for my future garden.

I used this light meter. Made a grid of the yard. I put the sensor in my golf putter and measured at ground level every hour. I'd suggest having some one write down the measurements to streamline the process while you read the meter.

Get light meter https://www.amazon.com/Dr-Meter-LX1330B-Digital-Illuminance-Light/dp/B005A0ETXY/ref=asc_df_B005A0ETXY/?tag=hyprod-20&linkCode=df0&hvadid=198104292682&hvpos=&hvnetw=g&hvrand=9213984898119892854&hvpone=&hvptwo=&hvqmt=...

Don't go above 1000 or below 500 and you're smooth sailing .

One last question (for now). I have this light meter and follow these readings to decide where to place my lights, do you concur with these numbers? I usually hang my lights ~18 inches above the grid in the bloom tent.

Seedling ~13,000 lux

Veg 50,000 lux (surpasses daily light integral)

Flower 80,000 lux (some colas get up to 90k+)

Also invest in a par meter or use a free one from your phone if you can. I have this one

Dr.meter LX1330B Digital Illuminance Light Meter, 0-200,000 Measurement Range Lux Meter https://www.amazon.com/dp/B005A0ETXY/ref=cm_sw_r_cp_api_i_TG2EDJ2HNBWNK43JV1BA

and it gives you a good idea on where your strong spots with your set up. Not bad on the pocket either.

I’m sorry but those app don’t work. I paid for and compared a few and they are way off.

Dr.meter LX1330B Digital Illuminance Light Meter, 0-200,000 Measurement Range Lux Meter https://www.amazon.com/dp/B005A0ETXY/ref=cm_sw_r_cp_api_i_RG1DRG3E40F0XWWYP5C2

I have 2 of these. One for home and one for my classroom (I’m a science teacher). This was reasonably priced, compared to some others, and got some great reviews: Dr.meter LX1330B Digital Illuminance Light Meter, 0-200,000 Measurement Range Lux Meter https://www.amazon.com/dp/B005A0ETXY/ref=cm_sw_r_awdo_navT_a_ZRGNZKY7CNZ7A3017VGJ

Crazy you beat me to it. I've got to be quicker than that!

Dr.meter LX1330B Digital Illuminance Light Meter, 0-200,000 Lux Measuring Range Lux Meter https://www.amazon.com/dp/B005A0ETXY/ref=cm_sw_r_apan_glt_fabc_GBZP3RR9Q9H7SBHEVYT4?_encoding=UTF8&psc=1

As someone who's recently switched from HPS to 2x 240w from Kingbrite. Save yourself the headache and get a meter https://www.amazon.com/gp/product/B005A0ETXY/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Great lights, but their potentiometers leave a lot to be desired.

Just a simple one, not on sale on amazon anymore but it's like this one: https://www.amazon.com/Dr-Meter-LX1330B-Digital-Illuminance-Light/dp/B005A0ETXY/ref=pd_day0_421_1?_encoding=UTF8&pd_rd_i=B005A0ETXY&pd_rd_r=DAP70AKM1YE88EEFG4HQ&pd_rd_w=V8Za8&pd_rd_wg=Ku3v1&psc=1&refRID=DAP70AKM1YE88EEFG4HQ

Make sure it goes up to at least 100,000, but you won't really need any higher than that. You'll be anywhere from 20,000 to 80,000, even in heavy flowering.

Once you get familiar with your setup and what LUX is at what canopy height, you'll need it less and less, but it's a good training tool when you make height adjustments to your lights, or as the plants grow closer to them.

Never used Recharge before, so can't really speak on that, but yes, the lux meter is fine with the QB. I have the same board and I used this meter

A lot of the graphs you see are produced on an Android phone using the Ceilingbounce app written by /u/zak. It's not going to give you laboratory-grade numbers for lumens and throw, but it can give you pretty good relative numbers so you can see how power reduces over time.

For more scientific data collection, you can buy a lux sensor and connect it to a logging multimeter or an Arduino.

If you want accurate measurements of lumens and throw, you can buy a cheap non-logging lux meter from Amazon. I have this one and like it, but didn't pay nearly that much - there might be better options. The meter is probably not accurate on its own, but you can buy some accurately-tested calibration lights from /u/maukka. You can use a calculator or spreadsheet to scale the values from the meter to match the calibration lights, and then apply that same correction factor to other flashlights.

https://www.amazon.ca/Dr-Meter-Digital-Light-Meter-Illuminance/dp/B005A0ETXY ...one of my most important tools

The light power is dependent on the size of the tent. I would invest in a Lux meter such as this one: https://www.amazon.com/Dr-Meter-LX1330B-Digital-Illuminance-Light/dp/B005A0ETXY/ref=sr_1_3?dchild=1&keywords=Lux+meter&qid=1620990593&sr=8-3

Once you understand the Lux output of your light at different heights you can dial in your tent. I got one after not having one for a year and it changed my growing life. It's possible to give the plants TOO much light and waste energy as a result (and money). Grab one, you won't regret it.

also buy a light meter

Hard to know! Best way to test is to get a lux meter and get some data to compare. Something like https://www.amazon.com/Dr-Meter-LX1330B-Digital-Illuminance-Light/dp/B005A0ETXY

I stopped fucking around with apps and bought THIS… $60 for peace of mind.. I love it

Ok cool. So, QB boards are strong and the only true way to tell is to get a lux meter and figure out how much light the plants are actually getting. Then you can figure out the PAR really easily and know if you are in the right zone.

For example, i've got (2) HLG 135W V2 RSpec in a 2.5 foot x 2.5 foot x 6.5 foot tent. These are actually 150 true watts each. In my space anything over around 500 PAR is too much, so i need to keep my lights at around 75%-80% power at 24" in flower. This gets me 38,000 Lux at the canopy which is pushing it at a bit over 500 PAR.

So, for my set up, seedlings should be kept far from the light (30"-36") and hit with 5,000-7,000 Lux. Then as they grow they will grow into the light and stretch a bit. You want to end up at ideally 24" above your flowering canopy. As they grow, you adjust your light per the lux readings. Early Veg: 15-20,000 Late Veg: 20-25,0000 Early Flower: 25-35,000 Late Flower: 35-40,000

NOW, you can go here and use these calculators for Usable PPFD for your space and to calculate PAR from Lux readings. Note that you can choose which light to convert Lux to Par with. Try to find the closest HLG to match what you have. Convert Lux to PAR: https://horticulturelightinggroup.com/blogs/calculators/converting-lux-to-ppfd

Grow light Calculator: https://www.cocoforcannabis.com/grow-light-calculator/

Lux Meter: https://www.amazon.com/Dr-Meter-LX1330B-Digital-Illuminance-Light/dp/B005A0ETXY/ref=sr_1_4?dchild=1&keywords=lux+meter&qid=1595363839&sr=8-4

Light meter

Light (the 660w version)

Thank you! I'll do some research on the 2.5 hours and see if that's a viable path...

Looks good.

I got this one https://www.amazon.com/Dr-Meter-LX1330B-Digital-Illuminance-Light/dp/B005A0ETXY/

It's good

Chill man, you're doing fine!

Depending on where you are located, and if your budget will allow it, I highly recommend getting a LUX meter. One of these will take all of the guess work out of light height and intensity. You can tune your lights to the optimal LUX reading (look online for a LUX guide for cannabis. There is a better version (PPFD), but they are much more expensive.

Get a fan.

Get a fan.

Get a fan.

And point in on your girls so they sway in the breeze. This motion will strengthen the stems and you won't have to tie them up at all during growth. Beg, borrow, steal - get a fan.

If you have them planted in new soil, don't feed them anything, for a while. The roots are super tiny small right now and will react to changes in water PH that comes with nutrient loads. The yellowing is likely from nutrient burn at this early stage. It is counter intuitive to not feed them, and it takes discipline, bu trust me, more people fuck their plants from over feeding than underfeeding. You can always add more, but reducing it is a hassle and requires flushing and all sorts of crap. For reference, I just started a Super Lemon Haze in my DWC set up and only just added nutrients to the reservoir today. It was surviving on the dissolved nutrients available in the tap water until now. It is 9 days old in this picture.

At this point you want to water around the cup in little drips, the roots are spurred by their need to look for moisture, so drop a little in different places around the plant and alternate those with each watering.

I had a 2'x2' foot tent at first, you could fit 3 -3-gallon fabric pots, but probably not with pot saucers underneath. Look for a WirthCo 22" oil drip pan, or dishwasher tray and put that in the bottom of your tent, it'll keep runoff off of the tent liner (which is never 100% waterproof to standing water) and give you more room to move the plants around. It costs more than 3 pot saucers upfront, but it is FAR better long term.

Good luck, be patient, they'll come back!

this is the one I have

It doesn’t look like a lot of light. Easiest way to get a good idea is to buy a light meter. This is also a good resource for light requirements for plants.

this one

I have a lux meter that I use. I raise and lower the light output and physical height based on the canopy, week of growth etc. Basically ramping it up from 8,000 Lux as seedlings to 40,000 Lux at the height of flower.

Figure out your ideal PPF for your tent. Grab a lux meter. Boom problem solved.

I use this one: https://www.amazon.com/Dr-Meter-LX1330B-Digital-Illuminance-Light/dp/B005A0ETXY/ref=sr_1_4?keywords=lux+meter&qid=1636772467&qsid=141-0671988-0470241&sr=8-4&sres=B075DC6X25%2CB005A0ETXY%2CB07S376KRB%2CB07Q1G5Z8W%2CB018QLIVSC%2CB087YZSVQ7%2CB01MFDRYD4%2CB098SXQB2T%2CB09BMR1SMF%2CB08R8F46J8%2CB07JZ3ZZQ6%2CB004K0A7I6%2CB08LHJT68G%2CB008S0OAP0%2CB0718VXDC5%2CB07LF4BT8V

An easy, fast, and cheap option for building a DIY lumen sphere is to use this meter with this sphere based on this guide. Consider3D printing an adapter to hold the meter and attaching a ferrous material in the back for mounting. You'll need some maukka lights to calibrate.

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If you grow plants under lights, it's totally worth spending $40 for a light meter on amazon. I keep all my alocasia anywhere from 400-1000 FC.

https://www.amazon.com/gp/product/B005A0ETXY/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

light meter . 375 FC for seedlings/clones. 2500 for veg. 10,000 in flower

Dr.Meter 1330B-V Digital... https://www.amazon.com/dp/B005A0ETXY?ref=ppx_pop_mob_ap_share

I don't expect it to be perfect by any means, but is this website an ok tool to use for these purposes. https://www.waveformlighting.com/horticulture/convert-lux-to-ppfd-online-calculator

I do have one of these https://www.amazon.com/dp/B005A0ETXY?ref=ppx_pop_mob_ap_share

here's the one I'm using: https://smile.amazon.com/gp/product/B005A0ETXY/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Actually got 2 so one could stay permanently mounted to my lumen tube so that my measurements from the lumen tube would be consistent across time.

Here's the lumen tube design I'm using. It's nice because a lumen is about 90% of 1 lux on it, so pretty easy to do the conversions. https://www.reddit.com/r/flashlight/comments/i1u8xp/nltd_new_lumen_tube_day/

THIS has been my saviour.... pretty handy tool to have

https://www.amazon.ca/Dr-Meter-Digital-Light-Meter-Illuminance/dp/B005A0ETXY ... important little tool

This is the light meter that I used.

Yes I totally get that. I am using this: https://www.amazon.com/gp/product/B005A0ETXY/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1 But, I will do some research and figure out the right setting for my light. I could always just buy one of these too https://www.amazon.com/Apogee-Spectrum-Accurate-Lightweight-Waterproof/dp/B077DWXKSY/ref=pb_allspark_session_sims_desktop_469_4/137-0677042-7422825?_encoding=UTF8&pd_rd_i=B077DWXKSY&pd_rd_r=9f958960-9f10-4802-b4bc-45c8777ccc16&pd_rd_w=...

But that would be cheating... And almost the cost of my SF4000!

Dr.Meter Digital Light Meter, 0 - 200,000 Lux Light Lux Meter, High Accuracy Illuminance https://www.amazon.ca/dp/B005A0ETXY/ref=cm_sw_r_cp_apa_i_HZUDDbVF50RJY

Actually I did. I purchased the one that u/Ohseventyfive recommended and got way better results. Hope this helps you as well man!

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https://www.amazon.com/gp/product/B005A0ETXY/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1

Par is not necessary. You can buy a lux/fc meter for $30 and it will tell you a good amount about you light, and then you can compare those numbers against how much lux/fc most plants want. The only difference between that and par is that par measures non-white light. Assuming you’re measuring sunlight or white grow lights, go lux/fc. https://www.amazon.com/Dr-Meter-LX1330B-Digital-Illuminance-Light/dp/B005A0ETXY/

You should measure light from right on top of the plant in that spot multiple times a day to get a general idea of what the average amount of light that spot gets.

Quick search says Amazon has a $35 one -- but not sure how much I'd trust it. Apogee's is just under $600 but you should be able to get a reliable one for half that.