High End LED Grow Lights: Coverage Area & Distance – LED vs T5 vs HID (Spider Farmer SF-2000 Review)

High End LED Grow Lights: Coverage Area & Distance – LED vs T5 vs HID (Spider Farmer SF-2000 Review)


Hi YouTubers! I’m AL Gracian from Albopepper.com. In our last video we looked at the latest
generation of LED growlights. We saw how super high efficacy ratings can
allow a lower wattage LED to outperform older, higher wattage ones. I was excited to share my 100 watt SF-1000
from Spider Farmer. Well, Spider Farmer hired me to measure the
PPFD of their double panel SF-2000 LED. And if I’m taking PPFD readings anyway…
why not share them with you guys? Today we’ll see how their 200 watt grow light
can be used for everything from seedlings to final stage medicinal -tomatoes. How much area can this light cover? How high up should it be? What role does side reflection play? Also, did you know these lights are “dimmable”? What’s the story there? We’re gonna find out! To start, I won’t cover the same details mentioned
in the last video. Be sure to watch it if you haven’t. But picking up from there, what are some key
differences between the SF-2000 and the SF-1000? At first glance I figured the SF-2000 was
just two 1000 panels placed together powered by a single, larger driver. But if you look closely, you see there’s a
real difference in the diode configurations. The 1000 contains 218 diodes at about 0.43
watts each. But the 2000 uses a very different layout. Each half has 303 diodes for a total of 606
at about 0.3 watts per diode. So that’s 170 diodes more that I would have
expected. The SF-1000 runs a 100 watt Meanwell driver
at 94 watts. The SF-2000 runs a 240 watt driver at 202
watts. Some interesting differences. But how do these compare when it comes to
light coverage? The 100 watt LED worked well in a 28 inch
chamber. So I tried doubling that for the 200 watt
model. The SF-2000 covered a 56 inch by 28 inch area
at a height of 24 inches. But the lighting wasn’t quite uniform. The PPFD numbers ranged from 306 to 614. If this was for seedlings or clones, some
plants would grow much better than others. The grow chamber was too elongated. When I compared it to the proportions of the
light it became clear. I shortened the area to 44 inches. Now the PPFD range only fluctuated by 150. I dropped the light to 18 inches and those
numbers shifted though, spiking to mid 8 hundreds in the center. So height makes a big difference. Over this coverage area 24 inches is the sweet
spot. The average PPFD was 584. For an 18 hr light cycle, that yields a DLI
of 37.8. And that’s really great. For normal greenhouse production, that light
level will work for all types of nursery plants, including basic high-light fruiting plants
like tomatoes. Of course, not all tomatoes. The ones of the… um “medicinal” variety
have special needs. In its final growth stages mari-tomatoes need
a 12 hour light cycle. These PPFD levels would only yield a DLI of
25.2. But many growers will shoot for a DLI of 41
to 51. That means PPFD values over 950. To get that, we need to reduce the coverage
area, squeezing all available photons into a smaller space. So I tried a 3 foot by 2 foot area at 18 inches. Average PPFD was 892. Getting there. I shrunk the area more, settling on 36 by
20 inches. Now our PPFD was 1054. At 12 hours of light, the DLI is 45.5. At that light intensity, you could cover two
18 inch wide plants. This would be fine for a mini grow chamber,
perhaps as a stealth grow project. For a larger area with more plants, this dimension
can help you to calculate the density requirement for your grow lights. You’ll need either more lights or an even
stronger, higher wattage unit. The SF-4000 might be a good option. I honestly like the idea of using two SF-2000’s
for greater flexibility over various grow areas. The SF-2000 can put out some fairly intense
light levels. And those levels are maximized through the
use of reflective sidewalls. Whether you use mylar, reflective paint or
a reflective grow tent, salvaging stray photons is crucial for maximum efficiency. With no reflective sides, here’s a PPFD map
of the SF-2000 at 18 inches. Let’s just look at this portion of those readings. Now throw up some side walls and you can see
the difference! Hopefully these different readings can assist
you in setting up your grow space. On one hand we have the very high-light, blooming
/ budding plants that require smaller coverage areas and closer mounting heights. But you can cover much more space in vege
mode while also raising the light appropriately. Based on this data I’d estimate that low-light
plants, like seedlings and lettuce would do well in a 43 by 34 inch coverage area with
a light height of 27 inches when side reflection is provided. Thus this 200 watt light can cover anywhere
from 5 to 11 square feet depending on the application. Of course if you dim it, that number might
be much less… Wait! Dim it!? Who would want the light to be LESS intense??? Leave it to the guy who says “lettuce” and
really means lettuce. Or mentions “trees” and actually means trees. For years I’ve been growing my seedlings in
this three sided grow chamber, divided into an upper and lower section. The top was fairly roomy. But in the bottom, there’s not much vertical
space. So I’ve continued to use a 2 foot T5 light
for things like these onion seedlings. I knew LEDs could be a good choice. But years ago, I found that some of those
cheap, low wattage panels just couldn’t cut it. Bad spectrums. Low power. And poor efficacy. And that leads me today. LEDs have come a long way and I can finally
say goodbye to these junky, inefficient fluorescents! Sacrilegious as it might be to some high-end
growers, I’m gonna dim this SF-2000 so I can run it in this tight space. Step 1: On a sturdy surface, place the light
so the diodes are in the air. Plug the light into a wattage meter. Step 2: Remove the driver. Turn it over and remove the rubber cap (labeled)
“V”. Step 3: Turn it on. With a very small Phillips head screwdriver,
gently and slowly rotate the screw counterclockwise. Once you reached the desired wattage, just
put everything back together. I decided to reduce my running wattage from
202 watts all the way down to 75 watts. This is as much or even less than a 96 watt
T5 system. In fact, with its one year old bulbs, my T5
was drawing the same power as the dimmed SF-2000. But how would the light levels compare? Without using any side reflection, here’s
the PPFD chart of my T5 at 9 inches. And now check out the underdriven Spider Farmer
LED running at the same wattage. It’s putting out 3 times the light using the
same power! Replacing the bulbs in my T5 would have helped
out. But that just underscores how inferior that
technology is. As soon as you put in new bulbs, you start
to lose brightness. Now I have a system that won’t need yearly
bulb replacements. The plants will grow much faster and stronger. Obviously, most of you would never use this
light in such a way. You could just buy lower-powered LEDs at a
lower price. But I just wanted to share this with you. These newer quantum style panels can phase
out older LEDs as seen in my previous video. They’ll crush any T5 fluorescent systems. But what about HIDs like metal halides or
high pressure sodium? I showed a chart in my previous video comparing
the efficacy of various lighting techs. Well here’s a more recent update showing how
LEDs compare to various HIDs. A great little article for you to read. Check the link in my description. Magnetic vs electronic ballasts vs doubled
ended HPS systems all have different rates of efficacy. So it depends on the type of HID and its specs. And regardless of efficacy, you’ll still need
enough power to achieve your target light levels. That being said, a light like this SF-2000,
running at 200 watts, could easily replace 400 watt HPS if it uses a magnetic ballast. I hope the data shown in this video has helped
you to evaluate the Spider Farmer SF-2000. But hopefully, it also gives you tips in optimizing
your light for your own grow area. Remember: larger plants, more plants, larger
growing area, later growth phases, shorter day cycles… these variables all require
brighter light sources. That means good side lighting, higher wattage
systems, more lights, reduced coverage area and or closer light placement. But if you get it right, you can expect great
results, with healthy productive plants! Thanks for taking time to watch. I appreciate all of your support on my channel. Please subscribe if you haven’t already. And as always, Happy Gardening!

100 Comments

  • AlboPepper - Drought Proof Urban Gardening

    November 6, 2019

    Learn more about artificial lighting and plant growth:

    What is PAR Light? https://www.youtube.com/watch?v=O3dxjk_E2Ac
    The impact of Red or Blue light on plant growth: https://www.youtube.com/watch?v=sfihE4IuFuU
    To avoid Tip Burn: https://www.youtube.com/watch?v=gHWf4Hfi3hA
    Light Cycles & DLI: https://www.youtube.com/watch?v=dQlOJ1zvoPI
    LED Wattage vs Efficacy: https://www.youtube.com/watch?v=99lL68N20Bc

    Here are some other LEDs that have performed well for me:

    Infinity Linear – https://www.youtube.com/watch?v=PfPmdKabemM
    Transcend LED T5 Tubes – 23wx4: https://www.youtube.com/watch?v=o7wHj6PLv6s

    For some tips on avoiding LED scammers, read more: http://albopepper.com/LED-grow-light-disappointment.php

    Reply
  • Jeffrey Bozko

    November 7, 2019

    I prefer a build with strips mounted on seperated heatsinks, so it doesn't break air flow

    Reply
  • Redline Geckos

    November 7, 2019

    Wish everyone went into detail like this with any and all reviews. Subscribing ! ๐Ÿ™Œ

    Reply
  • Stephen Smith

    November 7, 2019

    Again, thanks so much for all the info. Do you happen to know anything about the Phantom 1XL from Optic LED Grow Lights? I'm comparing it to this SF-2000. I will be using it for a small space, 2 or three plants only. And if it is a good light, do you have a link to it so that I can give you the credit–your videos have been so helpful! Thanks!

    Reply
  • Willow Forest Gardens

    November 8, 2019

    What is the best inexpensive light just to start seeds and grow microgreens?

    Reply
  • Bazinga Binga

    November 8, 2019

    Your Reviews are the best!

    Reply
  • Graham

    November 8, 2019

    It is a good thing Spider Farmer's PPFD doesn't fluctuate as much as their prices do…

    Reply
  • Bazinga Binga

    November 8, 2019

    Marshydro vs. Spiderfarmer would be a good Video. They cost the same (ts1000 vs sf1000) but different diods and max consumption. Both dimmable. Do you have experiance with the Mars Hydro TS 1000?

    Reply
  • James Butterson

    November 9, 2019

    Medicinal tomato's โ˜๐Ÿค“๐Ÿ

    Reply
  • Clif Wells

    November 9, 2019

    Mari-tomato lmao
    Yet another great post from you with awesome data analysis! you are a great communicator and cover some complex topics at an understandable level. Thank you for creating your channel, super helpful

    Reply
  • Cheflife 420

    November 9, 2019

    ๐Ÿค™๐Ÿง๐Ÿ‘Š

    Reply
  • Joe Smith

    November 10, 2019

    Haha medicinal tomatoes ๐Ÿ˜‚

    Reply
  • Crystal Garden

    November 10, 2019

    Nice video thanks

    Reply
  • Alexander Rewijk

    November 10, 2019

    you can actually up the light cycle for mari-tomatoes later on, when you know enough flowering hormones are present, you're sure for it to not get back into veg,
    slowly add an hour of light on the last couple of weeks, sure, it's not nature's way, that's would actually be gradually reducing it (gas lantern routine technique), but it brings results

    some people even put their plants in the dark for 48 or even 72 hours to build up hormones and trigger the flowering process quicker before going from 18 to 12 hours of light.

    there's also auto flowering mari-tomatoes that can be held on a 16-hour cycle throughout their whole life, which makes it a bit easier toget your desired light for 24h cycle,
    they do very well in the netherlands too, where our climate isn't all that, and we have the harsh northern hemisphere cutting the daylight pretty strongly
    (dark now at 5:30PM, and we're not actually in wintertime yet), the extra hours do wonders

    i chose to artificailly force them to 12 hours dark in july, by putting in my shed with the window sealed of with thrash bags,
    so you can still get the long days, and strong summer sun to flower, rather than veg.
    waiting for fall is asking for bud rot and fluffy results, humidity is a HUGE problem here for 3/4 of the year.

    growing indoor from feabruary orso, then putting them outside late april, and flowering them around early june would be like the best where i'm from

    Reply
  • Jimmy Mels

    November 10, 2019

    Thanks i bought a sf4000 a couple weeks ago and. Love it.

    Reply
  • Bob James

    November 10, 2019

    Will this sf2000 be great for my 3×3 tent growing pot ? Yes or no ? Please help ?

    Reply
  • bho wax

    November 11, 2019

    4000 review that's the 1 u want

    Reply
  • Mohammad Emran

    November 12, 2019

    Rich, informative yet clear and simple, great as always.

    Reply
  • Iso

    November 13, 2019

    hey albo, would this be sufficiant to light an area of 16 square feet if i want to grow a variety of veggies or fruits

    Reply
  • delosombres

    November 15, 2019

    Never smoked medicinal tomatoes. How does it taste?

    Reply
  • Blicky on Stiffy

    November 15, 2019

    You my man, are THE MAN! Gonna peruse and see what else youโ€™ve got good!

    Reply
  • TheLitesol

    November 15, 2019

    That's the problem with QB's hard to get deep canopy penetration.

    Reply
  • Huy Nguyen

    November 15, 2019

    im sitting here with a $50 budget that I can spend on a led fixture

    Reply
  • IVOR GREENPLANT

    November 15, 2019

    gonna put a link up for this on my channel . is that ok ?

    Reply
  • r4ymond3

    November 15, 2019

    which is a better light electric sky v2 es180 or the sf-2000?

    Reply
  • randy garrido

    November 17, 2019

    i want to see results

    Reply
  • firecloud77

    November 17, 2019

    Outstanding summary of grow lights. And under 11 minutes. Amazing. Subscribed.

    Reply
  • RT

    November 17, 2019

    I have (2) SF 1000โ€™s. This video is spot on. I have a 4×4 tent and currently use the (2) 1000โ€™s with a 600 hps. Planning to swap the hps for an SF 2000 or 4000 next and leave HID behind for good. Great review!

    Reply
  • Kel Lazell

    November 17, 2019

    I have a 4ft by 4ft would 2 sf 1000 be ok as I already have one at the mo

    Reply
  • Stabby McStabwood

    November 17, 2019

    Put some good work into this vid Al

    Reply
  • 57ashdot

    November 17, 2019

    @3:30 XD

    Great vid as usual, lots of fantastic info. You should check out the DIY HLG quantum board lighting kits. Very little assembly required, very low cost for high power lights.

    Reply
  • oldbab

    November 18, 2019

    Pls compare: ChilLED Logic DIY 270w 3-UP vs SpiderFarmer SF-2000…seem to be same no. of similar diodes but different drivers…what is better?

    Reply
  • Mary Ni

    November 19, 2019

    Wow, It looks wonderful and very clear. But I'd like to see the difference between SP 250 and HID, can you have a test for them, please?

    Reply
  • Animuldope breeds

    November 19, 2019

    Looks good fam great video ๐Ÿค™๐Ÿ™๐Ÿ’ช๐Ÿ’จ๐Ÿ’จ๐Ÿ’จ๐Ÿ’ฆ๐Ÿช๐Ÿช๐Ÿช๐ŸŒฒ

    Reply
  • Intents Growing

    November 20, 2019

    Now thats a light Review dammmmm, GOOD JOB!

    Reply
  • muchappreciated

    November 21, 2019

    Could these lights be used in non-growing home context? Specifically looking to treat SAD (Seasonal Affective Disorder). Most LED lamps are too wimpy to really make a difference.

    Reply
  • Eganwp

    November 22, 2019

    Best review Iโ€™ve ever watched of any grow light, bar NONE!! Thank you SO much. Only reason I stopped by was Iโ€™m about to purchase the SF 2000 and fell in love with your review style & technical knowledge! Thank you!!!

    Reply
  • Jeff Schmidt

    November 24, 2019

    What do they cost

    Reply
  • Dr. Rob

    November 24, 2019

    I found the Greatful Grower hiding in plain sight! Thanks for your content brother! Found a new channel to follow ๐Ÿ™‚

    Reply
  • Ain't Stab

    November 25, 2019

    Thx for the info ! I bought the sf-2000 and never had reliable ppfd data to adjust lamp height. I love my sf-2000 even more now ๐Ÿ˜. Thx again.

    Reply
  • Hustle Bones

    November 26, 2019

    I keep telling people to look at the par mapping of a newer 600w LED, with samsung or similar diode in comparison to a 1000w HPS. The par map says all.

    Reply
  • Joel Mcgilvray

    November 27, 2019

    Got to love those fresh tomatoes! I seem to have the best clones, with white LEDs vegetables. I run 600watt HPS plus LEDs and straight led red spot lights. Works great . I think a lot of tomatoes were selected under HP. Have been running same kinds for several years. PEACE AND LOVE

    Reply
  • Jordy Kingston Grows

    November 28, 2019

    *Great video. So many people out their are so focused on the power draw and what the electrical bill is going to be they neglect the fact that with a light that has the right intensity for flower that uses more electric will also give them more yeild which will always more than compensate for the increased electricity costs over the 3-3ยฝmonths of their grow cycle from seed/clone to harvest. *
    I wish alot more people saw this video and stopped wasting their money on lights only really good enough to veg as they don't offer the intensity over a decent coverage area for flowering
    GL โœŒ๐ŸพโœŒ๐Ÿผ๐Ÿ‡ฌ๐Ÿ‡ง

    Reply
  • Trust kill

    November 30, 2019

    You pronounced marijuana wrong. Almost sounds like tomato……. ๐Ÿคจ

    Reply
  • Day Lee

    December 1, 2019

    If we go over 1000ppfd wont we need CO2?

    Reply
  • Randy Livingston

    December 1, 2019

    Nice review. What do you think about waiting on the 301h, vs the 301b that this uses?

    Reply
  • Graham Wise

    December 3, 2019

    Im so glad I stumbled upon this channel. My question is in regards to photosynthetic rates at higher umols. In regards to your "Mari-tomatos", isnt there a max amount of umols that a plant can use for photosynthesis? I was under the impression that at certain temps, c02, and air flow, photosynthesis kind of maxes our around 600umols? Is that at specific spectrums, intensity, distance , etc? Im not super familiar with ratings in PPFD. Thanks for your content!

    Reply
  • CRAZY GOAT

    December 5, 2019

    Would you use this for microgreens?

    Reply
  • Alan Pinho

    December 5, 2019

    How do I calculate cost to operate a 200w light like this? Example 12 hours a day @ $.10 per kwh equal "x" per month? Thanks!!

    Reply
  • Julie K

    December 5, 2019

    Thank you for all the great videos! I just started growing all my veggies from seeds last year. I had an inexpensive light, but it only covered a small area. I'm trying to find the best light, that will cover a four foot area- growing tomatoes, kale, pumpkin, cucumber, watermelon- the normal garden varieties. What light would you suggest? Thank you!

    Reply
  • Trippy Vapors

    December 6, 2019

    Miss your other channel my man.
    Great content on grow lights communicated in a way that makes sense. Thank you sir!

    Reply
  • Wis.Gardener

    December 7, 2019

    Just ordered one from Amazon using your link. Thanks for the Discount Code, it worked. Stopped using my HID lights as they drove the electric bill up quite a bit.

    Reply
  • Heather Swanson

    December 9, 2019

    "Tomatoes" ๐Ÿ˜€ ๐Ÿคฃ๐Ÿ˜‚๐Ÿคฃ๐Ÿ˜‚๐Ÿคฃ

    Reply
  • Fish Talk

    December 10, 2019

    The h diode is better than the b

    Reply
  • Mandela Effected

    December 17, 2019

    Lmfao I just seen your review on Amazon, very helpful! I was looking for mycorrhizae videos and this was recommended lol glad I watched!

    Reply
  • gueeet up

    December 17, 2019

    So isit a good light or not??

    Reply
  • Andrew Brent

    December 18, 2019

    The XLG driver series unfortunately has the potentiometer on the underside making adjustment a pain. I have zero idea why Spyder didn't opt for the HLG "A" or "B" series which have a more accessible pot. location.

    Reply
  • Samuel Eden

    December 20, 2019

    Mmm tomatoes

    Reply
  • Home On The Range

    December 22, 2019

    I know this is probably a cheap light but the 3xlens really has me interested https://www.amazon.com/gp/product/B07YFXTT88/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&th=1 if you could give me any info on this light that would be amazing. Sadly im not rich and cant buy one for u to try lol i could barly afford the one i got haha but compared to the non 3xlens it seems like the light penetrates alot better. The thing i wonder is what its really throwing out they clam on the reading that its more than double than what the non 3xlens put out

    Reply
  • Just no

    December 23, 2019

    led T5 bars from philips are worth the look

    Reply
  • Melefarmer 808

    December 25, 2019

    Dimming location is the reason I didnโ€™t purchase
    Great reviews you broadcast ๐Ÿค™๐Ÿฝ๐Ÿค™๐Ÿฝ๐Ÿค™๐Ÿฝ

    Reply
  • oz93666

    December 25, 2019

    @ 8:00 …you discovered the big secret ….led (chips) run more efficiently when under powered (dimmed) … you can get 30% more light per Watt of electricity , and also the leds will last much longer …. The biggest cost is your electricity bill , light manufacturers don't care about that … they cut costs , use less leds and drive them at max power … When growers understand this there will be a new revolution in grow lights

    Reply
  • AMD RX470 G1 FX-6300 and Xbox

    December 26, 2019

    This or marshydro ts ?????

    Reply
  • Chris

    December 27, 2019

    can you do videos on the common 60W and 75W EcoSmart Homedepot LED lights?.. these lights are way cheaper than the ones found on amazon and I'm curious to see how the PAR values compare.

    Reply
  • Rikki lee

    December 27, 2019

    INVERSE SQUARE LAW ALWAYS GETS U ON PHOTONS

    Reply
  • Rikki lee

    December 27, 2019

    NICE LITE

    Reply
  • Bruce Evans

    December 28, 2019

    Hey man just found your channel. The videos are really good! vivosun own spider farms they look really simular

    Reply
  • Bruce Evans

    December 28, 2019

    I agree with you about the two lights

    Reply
  • Bruce Evans

    December 28, 2019

    Hey you said you're getting rid of the old lights? I'll take them I'll pay shipping as well

    Reply
  • C G

    December 31, 2019

    Oar Sum!
    ๐Ÿ™‚

    Reply
  • JustMe UK

    January 2, 2020

    I dimmed my 4000 down to 150 a driver ( simply to use less electricity and get the same results,its only in a 4×4 so that 100 watts over 18 hour a day works out at 10 plus KW a week, ill booat em bck up the last 4 or so weeks

    Reply
  • Steve French

    January 2, 2020

    I have some autos going in one of my grow tents. They're under a SF2000 I got back in November. The girls are loving the light. Node spacing etc is crazy good. They still have 3 weeks or so left.
    I have some autos going in my other tent using my old blurple grow light. It does good.
    But nothing compared to the spider farmer light.

    Reply
  • Bow Hunter

    January 5, 2020

    Iโ€™m about to have a go at my first grow Iโ€™ve got a 8ft x 4ft room was going to put in 10 autos using this lighting system what would you suggest?

    Reply
  • Edgar M

    January 11, 2020

    Can you do a video on the sf-4000?

    Reply
  • Nico Vertriest

    January 12, 2020

    Very, very interesting for me as a beginner. Thanks for making this available.

    Reply
  • William Owen

    January 13, 2020

    Love your work. Best on the web. Maybe you can help me. I am wondering which is better? Mylar or high albedo white paint? Thanks!

    Reply
  • Genesis1G

    January 13, 2020

    I'm getting the 2000 model thanks for the review.

    Reply
  • Steven Fastuca

    January 19, 2020

    Excellent revew.. Id would be good to compare this light to a Vero 29 Cob light. "Tomatoes" Really made me laugh.. ๐Ÿ™‚

    Reply
  • ReaL y Ty 4 Real

    January 19, 2020

    Mari-tomatoes lmao subscribed, keep it up

    Reply
  • Trpn8r

    January 20, 2020

    Great video! Looking to set up a 3×3 (39โ€x 39โ€)medical tomato tent. Is a SF4000 too much? 1- 2000, 2- 2000? Any suggestions?

    Reply
  • RVS BEST

    January 21, 2020

    Thanks once again for the info, I will be back next time and click the page in amazon for the lights right now dont have enough budget, thanks. God bless

    Reply
  • loudaddy2001

    January 23, 2020

    Did you say Spider Farm HIRED you to do these experiments!?๐Ÿค”

    Reply
  • James Wimer

    January 24, 2020

    He ^speaks in.actual sentences…
    The guy with the accent is fine .but its unlistenable for me…He stops and starts all sentences. But he knows his stuff.

    Reply
  • James Wimer

    January 24, 2020

    Subscribed…Thank you..

    Reply
  • Travis Evans

    January 24, 2020

    any suggestions on a cheap led to start vegetables for my garden meaning Tomatoes,Peppers,cauliflower,broccoli and like vegetables and flowers my area is 4.5 x 6.5? Very informative videos.

    Reply
  • krankenheim13

    January 25, 2020

    Last year, I bought my Spider Farmer SF-1000 because of YOUR video! Knowing literally nothing about growing plants under artificial light my orchids are now in bloom like never before and I'm getting new roots, spikes, and leaves across all of them like crazy! I've even got geraniums blooming indoors as an experiment – in winter!!

    Reply
  • Tom

    January 28, 2020

    i got 2 sf1000s, do you think this would cover 2 plants in a 4×2 area? i ordered one and realised i need more light so got another thinking itd be the same as sf2000 but id be able to space them out

    Reply
  • OldSquishy_ Gardener

    February 3, 2020

    Is 5k the highest spectrum on the board or are there any 6.5k diodes? If none, is the 5k high enough for good vegetative growth? Thought that was a little on the red side. Thx

    Reply
  • Moegamad Zain Brown

    February 3, 2020

    From start to finish that was freagen AWESOME!

    Reply
  • James Kimble

    February 7, 2020

    Mari-tomatoes ๐Ÿ˜†๐Ÿ‘Œ

    Reply
  • mandbaudio

    February 9, 2020

    I just bought this light to replace an old fluorescent one that I had. I have some hot pepper seedlings that are going now that have not sprouted their first true leaves. This video suggests a 24" height, but is that also for seedlings? I want to avoid leggy plants of course but also don't want too high a light intensity. Thanks for the great videos.

    Reply
  • stealthballer

    February 10, 2020

    you have learned a lot since you started making vids

    Reply
  • Ferg Ferguson

    February 10, 2020

    Really smart informative video may have to watch many times and share with others.

    Reply
  • Rudy Melo

    February 10, 2020

    This is literally exactly what I was looking for but couldnt find for hours

    Reply
  • Rudy Melo

    February 10, 2020

    When trying to get a high ppfd I dont want to get too high of a peak value in the center to avoid adverse effects or light bleaching. Whats the max value to avoid?

    Reply
  • Schmid Gabriel

    February 11, 2020

    I like smoke tomatos.

    Reply
  • S-B

    February 13, 2020

    I love that you know what you are talking about ๐Ÿ™‚

    Reply
  • Federico Incardona

    February 14, 2020

    Really a great review man! So usefull! But I have a question: it's ok to use the sf2000 in a square growbox instead of a rectangular one? Like a 80×80 cm for esemple

    Reply
  • andrewbee82

    February 16, 2020

    Hi man, always the best explanation! Not enough info out there about DLI requirements of AUTOFLOWERING tomatos ๐Ÿ… ๐Ÿคฃ.
    If they go 20/4 all their life long, what are perfect ppfd values and DLI? Please help. Thx

    Reply
  • Danny 86

    February 17, 2020

    I love you!!! Mari-Tomatoes ๐Ÿ˜‚๐Ÿ‘Œ

    Reply

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