What light spectrum does weed need to grow? – Growing Cannabis 201: Advanced Grow Tips

In this lesson learn what kind of light weed needs to grow. Find out what is the best light spectrum for growing weed, the best light spectrum for vegetative growth …


  1. Should I keep white light in with the red blue “full spectrum amazon light” during flowering to insure it’s getting enough light. I have led decent white light “full spectrum” bulbs but had to grab a few cheap red/blue full spectrum until I can get better quality ones. They look light a black light but give off the pinkish hue. All visible white light is absent. Should I re introduce some white light back in? Just finished first week of flowering. Only been under the “cheap red/blue for 4 days. Any help would be awesome. It’s my first indoor so mistakes are and will be made. Criticism not needed but advice appreciated. Thanks

  2. Being able to see the plant's real color is absolutely essential for me. I'll never buy a red and blue lamp again, only sunlight white from now on.

  3. Someone combined all 3 lights? or simply used HID and CFL? I dont wanna buy expensive lights… Thanks guys!

  4. I watched slot of your videos I'm having problems with light distance from my canopy I have a 1200 watt vivosun cob led can anyone help me

  5. I don't have just 1 particular type of light I'm using on my Autoflowers. I have several different kinds of lights all plugged in at the same time creating Red, Blue, White, and a Grow Light that has the Red, UV, IR on at the same time. My White Light is a 300Watt Bulb that generates heat too that's hanging way above plants like 4 feet above. Red Lights are shining towards the sides of the Plants hitting the Bud Sites. White LED Bar on Floor shining upwards towards the Plants from Bottom. Very Bright White LED Corn Light Hanging somewhere in the middle Length wise so both plants are getting light everywhere on them. I'm assuming this is working for me since just now White Pistil's are starting to develop more and more each day. Oh and the Blue light is a Flat Panel Grow light that I had for the Veg Stage but just pulled it outta my Closet now after seeing this Video cause he said to still have some Blue light in Flower Stage. I never knew that. Thought Flower Stage was just Red that was needed as far as colors go. I Wish Youtube allowed us to Post Pic's in the Comments so I could show everybody what I'm talking about lol. Anybody who is reading this probably has No Clue what I am talking about with my crazy light set up. Oh my question is how long after an Autoflower's Pistil's begin developing does it take for the Bud's to start forming ? Like if I just started seeing the White Pistil's for the first time within the last week how long from now can I expect to start seeing Bud's Forming ?

  6. Using 50 watt sylvainia spot grow lights. One per plant. They seem to be working great. Node spacing is tight. Plants are alert, leaves angled up.

  7. damn dude you have no clue what you are talking about when it comes to CFL .. first off yo are showing a picture of a incandescent bulb bot a CFL and second off CFL are great for growing

  8. To those interested… CFL lighting can deliver great yields and potency if managed correctly. They are much much cooler than HID and can b placed extremely close to the budding areas. Clever training of plants including using small pots to control size and direct application of CFL lighting will deliver for those on a budget who do not have cash for expensive environment control equipment. DO NOT ALLOW PLANTS TO STRETCH UP OR OUTWARD as this will prevent easy application of your light to budding area. Small pots and one to two week veg at maximum should achieve this.

  9. What's everyone's opinion on the Meizhi 450w reflector light?
    If you had one for your 1x1x2m tent, what light would you upgrade to?

  10. Can someone answer this for me, will x4, 4000k 23watt CFLs, combined with a 23watt 2700k led, and a 5500k 28watt cfl. My seedlings just sprouted but, from what iv read 4000k has mixed reviews. Some say its a sweet spot between red and blue and has more yellow which can help but over all it has the whole spectrum just not much blue on the higher end. So would the 5500k bigger brighter bulb and 4 of these cfls and a extra 2700k led work fine? Its not stretching at all. It seems to b very short for a seedling as most can grow like fuckers in 24 hours but mines grown, but it hasnt gottn that stretchy which leads me to believe its either a female or a very happy with the ligth situation setup. Pkease help me

  11. I have a Double ended SolisTek 600w-1100watt adjustable. I got a HPS bulb in and it's set at 600watts. My plants are not growing vertical. Is it the bulb? They are growing horizontally. But look very healthy.

  12. Im not sure if its the animation , because I still love cartoons, I think the content of your presentation was nice you didn't ( uummm) us to death and you didn't studder. I agree with some of the other post you should do a (low cost ) lol… dvd. I would want one as a training aid when I start to hire. Thanks again for the information…now Im going to watch it again ..my notes are incomplete..good job..seriously.

  13. they have all red and blue bulbs on the net add red when you flower turte lights put out uva an b ive done it 3 bucks they do heat up so keep them on the top at two feet

  14. Does light wattage matter a lot? Like is a 600w light going to make the plant grow better than a 100w? Or is it ineffective?

  15. How much are your classes?? I would like to get the prices of the classes and start ???? Please let me know when you get the prices and availability of the day I can start the classes my phone number is 561-503-1545 and my email address is bkilpatrick1975@gmail.com. Please try and get back to me as soon you have the chance. I'm also going to be getting the right kind of Cannabis for cultivating?? Thank You for your time. Bryan Kilpatrick.

  16. I just picked up a great starting light for seedlings from Costco. 39.99 veg/flower switch. Chains, and etl rated. 19w.

  17. Are more ir and uv lights on a led grow light better or worse? I'm looking at two lights one has 1 uv and 2 ir ..the other one has 4 uv and 4 ir, which would be better?

Leave a Reply

Your email address will not be published.