I have an xs4000 in a 2x4 lol can't crank it up to 100% it's kinda overkill but fills tent evenly so all get good high intensity so good flowers. I've only been able to get it to 75% at 18 to 22 inches any more seems to start burn leaves or start to droop down. Definitely better off with p4000 or xs4000 in a 2x4 if your experienced i also have a mars sp3000 in 2x4 that works really good too
Just make sure yall research before buying viparspectra, or you could end up with an older version or something shady. I decided to pass up viparspectra for grow light science..
What I want to know is the true comparative watt for watt. I would have liked to have seen the xs2000 at 100% compared to the p4000 at 50%. Better yet, determine what intensity the p4000 has to be at to replicate the xs2000 from the same height, then do the math. I feel the p4000 would shine there, and temps much lower.
I bought 3 Viparspectra lights ks5000 ks 3000 and P600 I'm not sure i like them Veg they seem ok But flower they seem be be not so great The old HPS does make the plants grow faster and more healthier. In my opinion.
Lol got a hortibloom evo 720 in a 1x1.2 m2 that's 720 watts. Remember these light can turn down go for the hightest output led you can as the efficiency gos up and so does the price.
Even at 12 inches, the e200 only gets to 600 pfd. Isn’t the goal 1000? Will this be enough light? Can i put it even closer than 12 inches? Old grower learning about led.
600 is about the maximum you want without CO² supplementation. For maximal leaf surface transpiration rates you want 1200ppm of CO² and as much light as your plant can handle. Look up the Fluence Photobiology Guide at: fluence.science/wp-content/uploads/2018/11/Fluence-Photobiology-Guide-2019.pdf for a good overview.
Some you can put closer than 12 inches, but red wavelengths cause more "burn", and it depends on the exact wavelengths, stage of flower, and what the plant is used to. 1500 is full sun so it's worth knowing what is enough and what is too much - and how that relates to a plant's growth stages.
Studies quoted in Cannabis Business Times' recent Light Report indicate that providing over 1000 PPFD increases product by 1% for every 1% of increase of light, up to about 1800 PPFD. Well -managed plants can handle an amazing amount of light. Go for the most wattage you can afford.
@@kmikaz2.029 Plants will tolerate amazingly high PPFD if given a proper ramp-up and plenty of water and nutes. The company mentioned in the Cannabis Business Times report works flowering plants up from 1000 to 1800PPFD. I must say co2 was not discussed, so maybe it is used. Still, high PPFD lights pay off. 1000 to 1500 is easily reached with lots of the led lighting available these days.
@@johnpool5216 Hey,what would be the best led for a 2.5 feet x 6.5 feet space,would you choose 2 viper spectre p4000 or 2 xs 4000 or 1 mars hydro sp6500 ?
@@SSH01 Looking at the PPFD footprint of the lights you mentioned, I believe two Vivarspectra XS4000 lights, end to end, will give you the spread you need for that size tent.
Last year I Purchased 5 oscillating 6 inch fans. After receiving them 2 of them did not work So I contacted growbuds and they replaced the 2 defective ones. A few days later another 3 stopped working And I never received any response from them. After numerous emails I still did not get a response because now I have 7 fans that are not working. I would never buy anything from them again. I also purchased 6 spider farmer lights from them Hopefully I will never have a problem with them. Dealing with their customer service is a total nightmare. If you need to purchase anything please I beg you go elsewhere.
I hear some people saying the p4000/ whole p series is not very good for flower. I was planning on using my 2 p4000 in flower as well as veg. Should I get a better light for flower? Also some people saying this light gets way to hot for an led. What do you think?
Because you don't know brand names other than Samsung and Mean Well, it means anything else is lower quality? Maybe it means you don't know what you're talking about!
