Light is light when it comes down to it; when using compact fluorescent lighting, you’ll need many, many light (bulbs) to do the job. Period.
When using HID lighting, one, two, three bulbs (lights) to light up a whole room quite brightly.
Since light is light, making sure you use enough of it will ensure you get what you want in the THC/potency department.
So what are the things that REALLY matter when determining if you will grow weed with high levels of THC?
Rule # 1: Genetics matter first, when determining possibly high THC levels!
If you don’t know the genetic lineage of the strain you’re planning on working with, don’t be disappointed when your harvest couldn’t get you high if you smoked it all in one hit! This is why people spend money on reputable seed breeders or banks, or secure clones from reputable sources. If you have stable genetics, you can rest assured that YOU are the only thing that will prevent your final harvest from “danking-out.”
Rule # 2: THC is determined by a combination of factors which you MUST learn.
The type of nutrients you feed; how often you feed and how much you feed, can determine your plants THC levels indirectly. The amount of ventilation your plant receives in flowering will impact it’s THC levels, as well as temperatures, humidity, the amount of stress suffered by the plant and many more factors. The best thing you can do to up your THC level to that or close to what’s stated by the breeder, just grow a healthy plant. It’s really that “simple.”
Rule # 3: Intense light can increase potency.
The more light you give your plant’s foliage, the more potent your end product will be, even if at the sources closest to the light. Since CFLs can be placed close to plants, they absorb intense light before it has the chance to diminish.
CFLs can provide the optimal environment for growing your plants to their peak THC potential, since trichome production is directly related to light spectrum and intensity, as the plant produces them to “protect” itself from sun damage (sunburn), pest and animal threats/damage and to capture the pollen given off by ripe male plants. Trichomes contain resin glands, or THC, which causes the effects that we all know and love–potency!
Rule # 4: Buds located in highly-lit areas will be higher in THC than shaded parts.
This is a no-brainer. Get as many 23-watt+ CFLs that you can around the shaded area of your plants, usually at the bottom branches. This will really help after the 5th week of flowering when the buds start to swell and eventually ripen, preventing the dreaded airy, density-lacking flowers often associated with CFL grows.
By Rob Narley