spectrum

  1. F

    Letting the plants out

    I take my strongest girls out in the evening for natural light from the west window. I have a good light setup but i believe that even a little strong sun benefits the plants by giving light to sides and bottom. Anyone else do this. If anyone responds, ill post some pics of the buds in the...
  2. S

    Grow Questions, LED light questions

    Hello, I have been growing for the past 8 months. I know enough to get things done but still dont fully understand a few things. I need advice from an expert here. 8 months ago I purchased an LED grow light, Maxisun PB2000 is the brand. The plants really respond great to this light. I currently...
  3. G

    A suggestion for a light, what do you think?

    Hi lads! I was thinking about buying this light for my plants and I am not sure it is a good idea in terms of costs, efficiency, number of plants to grow under one of these, and the rest of questions I might have in this crazy detailed and confusing importance and complexity of grow lights for...
  4. G

    Light choice, efficiency, hopes and dreams, technicalities and optimum results

    Hi lads! I was thinking about buying this light for my plants and I am not sure it is a good idea in terms of costs, efficiency, number of plants to grow under one of these, and the rest of questions I might have in this crazy detailed and confusing importance and complexity of grow lights for...
  5. Dontjudgeme

    Sufficient led light for 3x3 tent during bloom

    I’ve done some pretty good research on light coverage, whether that be during veg, where the spread seems to be more forgiving, where as bloom/flower poses a totally different predicament, and this is where my concern/interest hovers. Hanging distances, PAR, full spectrum, blah blah blah blah...
  6. K

    Does HPS cause more stretch than a MH?

    I’ve been reading a lot of conflicting information about this. Some people are saying HPS causes more stretch with quicker growth and others are saying MH causes more stretch with quicker growth. Who is right? Does anyone have experience vegging with both? I’m currently in early veg and have...
  7. C

    Would it be a good idea to mix LED blue/red strip lights with LED warm/cool strip lights.

    After doing research on ideal LED light color spectrum, it seems like cannabis plants need mostly red and blue lights, but also benefit from other colors as well. I want to do a plant racking system with a 2 week veg time straight from clone (sea of green), then 8 weeks of flowering. It seems...
  8. ChiefRunningPhist

    SPD simulator for DIY builders

    The question of how much of a certain color is often asked. I'm not professing to know the exact ratios, but attached is a little excel file to help you figure it out. You only need to enter the number of chips, your desired brightness from 0 - 5 and then a custom efficiency if the LEDs are...
  9. Rainbow Warrior

    Flipping Autos indoors

    Hi guys and girls about to start my 2nd indoor grow. i want to grow a couple of autos and a couple of regular seeds at the same time. Coz the Autos will flower first, do I have to change bulb to flowering bulb, or can the autos flower with veg light? If so, will that have an effect on yield...
  10. Yesyes3000

    LED cob strips

    Hi all I’m looking into purchasing some cob led strips. What is a good spectrum to buy for veg/flower together ? I think I heard 3500k but I’m not sure. Also what are some affordable options for these strips ? Besides cutter led... thank you for your time
  11. Renfro

    A very interesting study about spectrum / cannabis

    The Effect of Light Spectrum on the Morphology and Cannabinoid Content of Cannabis sativa L. If you read this article and have observations please discuss here. Enjoy
  12. JSheeze

    Mono-spectrum (50w more), or poly-spectrum (50w less)?

    2'×4' bloom scenario using E27 LED... 1 spectrum (50w more)... 493w [100% - 3000k](80CRI) or... Mixed spectrum (25w less)... 468w [11% - 6500k](80CRI) + [89% - 3000k](80CRI) or... Mixed spectrum (50w less)... 442w [23% - 6500k](80CRI) + [77% - 3000k](80CRI)
  13. Third Coast Cultivators

    Bulbs for bud

    Hey brothers and sisters, I am running 6-1k watt hortilux daylight blue MH bulbs. This is my first time with this bulb. I have talked to some guys that will run these bulbs start to finish, due to the superior spectrum. I know these are the best bulbs on the market for veg, but not so sure...
  14. SSR

    PAR/light meter recommendations

    Hi folks. I've played about with differing spectrums etc over the past couple years but don't have a PAR meter. I really want one as I'm going to build from scratch but...... The reason the thread title says light meter too is that I'd like to be able to measure from IR down to UV. These will...
  15. mauro88

    Best led for 2x2,5?

    I am growing 4 autoflowers in a 2x2.5 tent. I need the best led light available (probably fullspectrum?) How do you guys think about the next light mini? And what do you think of the Optic 1 XL? If there are better lights that I should buy please let me know! And tell me why :) The light is...
  16. Sumby

    Which is a reputable led brand

    hi guys. I have 500w of 5000k led running at the mo. I need something for flowering. I know there’s a lot of cheap Chinese stuff on the internet at the moment but I don’t want to be spending 100’s for a first grow. I have seen there is a sale on a website and there’s a 600w dual chip kingbo...
  17. Sheldon92

    Too much heat! P600 Platinum light, 2 x 4 space

    I have a P600 Platinum light in a 2 x 4 grow tent with an exterior portable AC blowing in cold air and a carbon filter sucking hot air out from top. It was perfect when I had my light only on VEG. But now that I'm flowering, I put VEG and FLOWER buttons on. Ever since, my temperatures have been...
  18. 420x024

    What is the perfect ratio or red-white-blue (kind led xl1000)

    Hi so I'm growing some star dog clones and they're in 10 gal or 7 gal pots. I transplanted them last week from a 1gal and they were pre flowering. It is now a week later now they are put into flower, and I watered with a tea and induced flowering with insect grass and foliar the same as the...
  19. 420x024

    First 3 days into flower with KIND XL 1000 Need advice for the light spectrum please!!

    Hi so I'm growing some star dog clones and they're in 10 gal or 7 gal pots. I transplanted them last week from a 1gal and they were pre flowering. It is now a week later now they are put into flower, and I watered with a tea and induced flowering with insect grass and foliar the same as the...
  20. IndoorMadness

    Cxb3590 help with perfect kelvin spectrum

    I'm building a 2x2.5 grow box using 4 36v cxb3590 setup. Im new to COB lights. Ive seen amazing results using COB set ups so i planned giving the a try on my small scrog. The plan so far is to use 4 6500k dd bin for veg then swapping them out with 4 2700k bb bin for flowering. Would a mix be...
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