HPS lights are suitable for both the vegetative and flowering stage of cannabis growth and the light they give off encourages plants to quickly grow tall and produce big buds. hahaDefintely not a good choice to use any hids over the 250w in a 60x60 cm, or even smaller, grow tent.You can't upgrade to anything really better than hids with 120£, trust me.I switched this summer to 480w quantum boards with horticoltural specific diodes with IR and UV... and now I'm at the first run with this beast.Grow Your Own, But Don't Grow Alone... Let's Grow Together!Grow Your Own, But Don't Grow Alone... Let's Grow Together!Grow Your Own, But Don't Grow Alone... Let's Grow Together!The Coco for Cannabis grower badges reflect the experience of the growers in our community. ... if you are restricted in your height, LEDs can be placed much closer to your canopy. If you put your hand where your plants are for 30 seconds, does it feel too hot for you?
Similar Threads. You can figure out the intensity at whatever distance and convert the lux into PPFD. If the leaves start pointing up like this, it’s a sign the plant is getting a LOT of light. I wouldn't even run the 4200k man they are full spectrum enough. Despite these differences, MH and HPS bulbs need to be kept about the same distance away from your plants. 2 years ago. Other CMH models may need to be kept up to 3 feet away! 30,000 lux for a 3100k CMH is 507PPFD. Although LED, LEC and HPS grow lights can produce the biggest yields and most potent buds of all grow lights, they need to be used correctly to get those results!By positioning grow lights the right distance from your plants, you’ll create the highest levels of light your cannabis plants can use. Is this stress from the light intensity and now it will continue flowering, or have I fucked it? I first ordered a nice light, Maxibright 315w with Phillips 930 agro, but it was waaaayyyy too hot in summer.The plant is nice and short and spread horizontally so I put the CMH back in and temps are good at 24-28 now but i'm struggling to find information on hanging distances for the lamp or 315s in general... currently at 50cm / 20inch, I've seen people claim as close as 12inch in flowering.So i'm wondering if anyone here has experience with CMH and how close you where getting?
Has anyone switched from HPS to CMH for flowering? dabs710, Nov 13, 2017, in forum: Growing Marijuana Indoors.
I have a 4x4x7 tent and was planning on using a 600w HPS for flowering(I have 4 plants),I have been reading up on CMH bulbs and can afford to buy 2-315 CMH units but would like to hear opinions from anyone that has actually used both types and can make a decent comparison. Philips is a popular manufacturer that sells a variety of bulbs from CFLs, MHs, HPs to CMHs. And they are trusted and favored by users because of its quality and durability. Finally we discussed what types of lights and reflectors may be the best fit for your space and ceiling height. This CMH bulb from Phillip has the color temperature of 3100k. The recommended distance is 12-18 inches from your canopy.
“LEC grow lights” are only sold by Sun System because the term “LEC” is trademarked by them. Any info on reflector, ballast would be great.
Although it may be tempting to keep trying to move grow lights closer and closer, your plants simply can’t use more light past a certain point!Each type of light needs to be kept a different distance away, so if you feel confused, this tutorial will show you how far to keep your grow light so you get incredible results every time, no matter what your setup!Metal Halide lights are well-suited to the vegetative stage and tend to encourage plants to grow short and squat though they are less electrically efficient than HPS. I will finish the Sour Orange under the LED now, and maybe try the next one under the CMH paying closer attention to conditions and leaf temp but this time around was not encouraging. I'm covering a miniature grow room 50x50x100cm / 1.6x1.6x1.2ft so yeah a huge 2.5 sq ft. 30+” 4x4 ... We’ve also talked about the Ugly, the Good and the Bad of lighting distance to your plant’s canopy to help you properly place your light. Usually the upper leaves are affected first (yellowing or turning brown or spots) by too-close LEDs, but symptoms can also affect other parts of the plant.Depending on the make and model, there’s a lot of difference in operating different LED grow lights, but if you weren’t given any instructions with the light, here’s a quick reference guide:Powerful LED grow lights need to be kept relatively far away from your plants to prevent light burnAs long as it’s not too hot, you basically can’t give your cannabis too much light with these types of grow lights.
He started and the light was like 6 feet away. With the 315 strapped as high as possible it is about 28inch from the top of a 12L fabric pot. I could of course put the led back in and drop it down, or I would prefer to get a dimmable ballast for the 315. This is different from Edges of leaves may turn up from light stress. To maximize the light to my plants in the flowering stage, I personally replace HPS bulbs every 3rd grow, but that’s a bit excessive.If you see that all the leaves are turned up toward the light, it’s a sign your plants may be getting too much light. When you dim a CMH you're not getting the optimal light spectrum and you're really not utilizing the benefits of CMH (Quality Light Spectrum! Known Grower ... you hardly can work with a cmh under 12 inch: it's the minimum distance for flowering but you should stay around 18 inch during veg [24 in earyl veg].
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