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Bar LEDs are extremely popular. The only problem with using bar LEDs in grow tents is that they take up the entire footprint of the tent. So we have devised 4 simple tips to help over come this issue. 0:00 Intro 0:17 Why you shouldn’t have low lights 1:01 1. Dim your LED 1:24 2. Use tall tents 1:43 3 Switch to Inline Filters 2:07 4 Add CO2 to your grow space 2:46 Outro Head to our website http://www.growell.co.uk Or give us a call 0333 003 22 95 Find GroWell on social Facebook – https://www.facebook.com/GroWellHorticulture Twitter – https://twitter.com/GWHorticulture Instagram – https://www.instagram.com/growellhorticulture
38 responses
Just dim it down to 50% and lower it down to 12” distance. That should do it. Where is the efficiency in putting 700 W in a 4’x4′ ?
How many of these will i need to cover a 2.4×2.4 meter tent?
For a tent that size we would recommend 4 x Exolux Pro Sirius LED’s. Most Bar LED’s in the 600W – 630W range cover a 1.2 x 1.2m area.
4
I’ve got a 180cm tent 200cm and 230cm but I found it easier to use a cmh with 2 mars sp250s and I’ve got heaps of room but found with my hlg needs to be on about 90 or 80% to get the effectiveness but I’ve noticed mixing cmh with led or hps is really good way to grow, I still think my cmh dose better than most leds for cost size and the heat is less than running 2 sp 250s
Brillant ideas
That’s definitely a better way than LEDs. You’re getting certain radiations that induce flowering. That’s why LEDs will veg well, but by themselves flower weak.
@Kid Dynamite yeah Man led make nice buds but not as large and yeah cmh is the way to go with spread and quality light but led is so cheap that’s what I like the mixture I’ve been using the migro uvb light and it dose work abit I noticed bigger yield but I changed bulbs to more red so it’s probably that but have noticed a touch stronger, usually just put it on for 1 and a half hours but yeah man I use the leds to fill in spaces that need light so i don’t need another cmh as overkill, I did use the 600w cmh replacement bulb in hps but still would rather 2x cmh.
@Robert Miller I’m glad you mentioned something, as you have worked with both LED, and HPS. I take my yield into account with my cost. I’m not a heavy user, so 1 grow a year has me set with meds. I also still have many of the clone only- old school phenotypes from way back. I think the quality of the genetics sold have fallen off greatly in the last 12 years. If you want, check out some of my grows on Cannabis Connection (a space in Quora).
Set your filter outside of your tents
If you’ve got the available space outside your tent this is definitely a good call regardless of what lighting system your using, as it makes working in the grow space so much easier.
There are hot spots if your ballast is attached to the light. If the ballast is removable move that sucker outta your tent….. Also for new growers know there is no such thing as a climate CONTROLLED tent. The tent is just as hot or cold as outside the tent… The tents only gonna get hotter. If you have a mini split you can put it in the tent but know your fans will extract that air but if the extracted air is going into the grow room (Which it really shouldn’t but im not writing an article here) then it will make the ambient temperature cooler.
If you grow in a tent and exhaust it with fans, then adding CO2 is pretty much worthless. youd think they would know that
When you’re adding CO2 either through a canister or mushroom bag, you’re introducing more CO2 into the growing environment than you would with a normal in-take fan from outside. Plus CO2 is a heavier gas meaning in general it’ll concentrate lower in the tent, away from the extraction system at the top of the tent.
So will you extract some CO2 with an extraction system? Yes, but nowhere near the amount of CO2 you’re adding.
Plus if you’re worried about extracting it all away you can always turn down your extraction system to a lower setting.
You need co 2 boost with the improved led lights if not your wasting light
My cheap co2 set up. I have a 4×4 in a small room about 10ft long and 7ft wide. With a fish tank co2 generator. filled with 400g or bicarbonate of soda and 400g of citric acid…both cleaning product quality. + 600ml of water. running at 800-1200 ppm as the grow progresses (waveform from of 150ppm). each refill cost about $2.40 and last 4 days 24/7 as I run 24 hour light. . But do open up for half an hour and refresh the room each night.
Tank and controller outside the tent with tube going in and placed above the canopy. Two vents open on the tent like scoopes and it all just circulates around the small room and tent. I get longer more economical waveforms at 82F – 85f which is higher than my old style of 78f. I only run the system for about 5 weeks in the centre of a 10 week auto’s grow. so the last 2 weeks of veg and first 3 of flower. as I want lower temps at the end without reducing the light, ( i.e open the window.) as the lower temps preserve the terpenes, but in summer I still have to drop to 3/4 power to achieve the heat reduction.
Also high humidity, increases the wave form as it hangs in the air longer. so 70% is fine at those higher temps in that stage of the grow, Hence why I stop in later flower, as I want lower humidity of 50- 60%. app controlled humidifier in the tent. but dehumidifier outside tent if required. I run my 6 inch AC infinity at levels 4 and 5. triggering 6 occasionally. which keeps the system stable 4L Tank was about $120 with solenoid and Digital CO2 Carbon Dioxide IAQ Monitor Controller. was $140. has a light out cut off. My yield has gone from 14-17 per run to 21-23oz in four 16 L pots Coco perlite… under lumatek 600w pro Using advanced nutrients PH perfect range.
How many bags of co2 would i need for a 5ft x 5ft tent ?
For a tent of that size you’d be fine with just one CO2 bag.
You can get them from us here: https://www.growell.co.uk/fans-filters-environment/co2/the-exhale-365-self-activated-co2-bag.html
@GroWell Horticulture thanks you 👍🏼
Can I seal myself inside a tent to enjoy my farts in private?
Of course, it’s your tent.
#1 thing ya must do. Chuck em, sell em, and go with HPS for real yields
@Kid Dynamite The dispensaries around me all use LEDs…..I average 2-3 pounds per 600 watt LED light. LEDs are the way to go.
Of the thousands of grows on Rollitup, Growdiaries, etc you have never seen one grow that compares to your HPS grows? Bullshit.
@dave dennison I’m a grown man! I made a statement I’ve found to be factual. I would love to be able to use 300 watts, and get the results of a 600, or 1k HID as has been rammed down everyone’s throat for the past 8 years. I have only asked for anyone to show me I’m wrong. I’m not about name calling, or anything else. I can show nothing but stellar grows for the last decade +. The amount lost in yield more than makes up for any electricity use. Perhaps today’s genetics have just gotten that bad? Idk
@Dan K Look in my profile pic. If you seen thoes, and would like to see more I’ll be more than happy. If you’d like to check out some of my work, I’d be happy to direct you there as well
@Kid Dynamite
I know, you already told me….6 months ago…i aint gonna argue, it’s horses fer courses but ive grown plenty under 600w hps and my migro leds are, overall(stretch,heat,lecky bills) far better with no compromise on yield and quality (just my take)..its not a dick swinging contest..arent we all just growing weed???
@dave dennison Yip. I didn’t notice when this was from. I had an offer for sponsorship from an LED company. I had refused the 1st time I was asked, as I would end up talking a loss. I’ve only wanted to see some of the better yields from the best lighting on the market. I’ve yet to see anything anywhere to change my mind. I’m not swinging my dick. I don’t want anyone to get a concussion 😉
Bud box is crap and leaks light like a sieve.
We’ve loved using Budbox for years and never had this complaint.
Gas for Homeusers is a Bad idea
Its my first grow in 10+ years i just bought a fc3000 in a 3×3 tent. Any height advice for veg and flower and at what power setting? Any advice would be appreciated thanks
For a 300W LED start roughly 1.2m – 1.5m above your plants. If you’ve just transplanted or potted up about 50% power should be used initially. Gradually increase the intensity and lower the fixture to 1.2m above the canopy throughout veg. Then for flowering lower the fixture to roughly 70cm – 80cm above the plant canopy.
This is a rough guide based off other 300W LED’s we sell, can’t speak specifically for the FC3000 as we don’t stock it, so keep an eye and adjust as you see fit.
@GroWell Horticulture 1.5m? xD you can hang those at 50-60cm and dim them.
I have Mars fc3000.. I want the bars hanging close as possible so I can save electricity. I just can’t find the right balance as of yet.
propane?
If you’ve got a quite a large grow and a safe space to use them, propane CO2 burners like HotBox and Pro-Leaf CO2 generators are an excellent producer of CO2 if you’re growing under LED’s.
But it would have to be a very large space, starting around the 8m x 8m mark. Otherwise you’d need an additional controller.
@GroWell Horticulture oh I didn’t know that’s what these machines used. Thanks for the info!
if you need to have the light that far away from your canopy youve got the wrong light.