The effect on the electrical bill, and the lack of needed external cooling, make them great for stealth and low-impact builds as well. They are not ideal for the best growth possible, LEDs and HPS system hold this spot, but they do work and they are great at their specific niche.
These work by dipping a bit further into the red spectrum than daylight CFLs, and work slightly better on blooming plants due to this. 2700K bulbs have their place, but we tend to avoid recommending them. This is because it’s additional equipment that isn’t going towards the budget of things in your grow that can make a large difference.
This is another light that will indeed work when surrounding a plant, but the results will be less than stellar at the end of the day. Recommended if this is what is available, however, there are better purchases to be made even on this list.
Buyer’s Guide: Selecting the Best CFL Grow Lights
Light spectrums can be an issue with these, as the popularity of CFLs has lent itself to misconceptions on the ideal spectrums to purchase, as not all plants grow the same as cannabis. Let’s take a look at some of the better CFL lights we’ve come across.
A set of SunBlasters, which come in a 4-pack, can almost certainly have some fairly nice results. However, when compared to the likes of the Emart 4332004402, there’s a lack of power, which will result in a somewhat stunted plant at the end of the process.
When to use CFLs
The amount of wattage these bulbs use is almost negligible for most grower’s power bills. Compared to other ways to grow indoors, the amount of energy saved is worth noticing.
The amount of heat these give off is so limited that forgoing to use of large ventilation systems is doable, as long as odors aren’t a concern. Put a CFL in a closet with a small reflect and some mylar around the room, and you’ll be surprised by the amount of light they can produce for such a small purchase.
As your plant grows, be aware of the height. For any stems that are taller than the rest, gently bend them down and away from the center of the plant until they’re at the same level as the others, securing them down with twisty ties, like this:
So if you use 150W of CFLs (as recommended to start with each plant below) you can expect about 37.5 grams, or a little over 1 oz per plant. If you add more CFLs for each plant, you will increase your yields somewhat proportionately to how many watts worth of CFLs you add.
Check out WasabiMayo’s amazing (and budget) CFL microgrow in pIctures…
When you’re buying CFLs, they come in different “color spectrums.” Some CFLs appear more orange/yellow, some are almost blue, and others almost look like bright white daylight on a sunny day.
How Many CFLs Do You Need To Grow Marijuana?
When using this method, I’ve found my cannabis to be really resistant to issues or problems, especially considering this method was the one I used for my very first harvest and I had no idea what I was doing when I started.
It’s optimal to use ‘daylight’ (6500k) colored bulbs for the vegetative stage and ‘soft white’ (2500k) colored bulbs for flowering, but you can use any color CFL during either stage and your plant will grow well. The color spectrum of the bulb is not nearly as important as the total wattage.
If you don’t change your schedule to 12-12, chances are your marijuana will just keep growing forever and never make buds.
When your cannabis plants are about half their final desired height, you will change them over to the flowering stage so they start growing buds.
The reason for this is that marijuana will generally double in height after being switched over to the flowering stage.
Recommended For: People who want a super-cheap, super-easy grow style.
As the plants get taller and start blooming, you may need to get a couple more CFLs to light them from the sides. Basically if you see any dark or shadowy areas that are more than 6 inches from a CFL, then you should get another CFL to plug in that ‘hole.’
60 grams) per plant of bud retail value: You may get even more but a reasonable estimate for someone who follows the directions is to harvest at least two ounces of dried bud from each plant. At $10-$20/gram (prices around here), two ounces of cannabis is equal to $566 – $1133 which is worth much more than the money you need to put in to get started. And the amount you spend will go down each grow, while your yields will likely go up. Plus, you don’t have to go anywhere to get your buds! I got a total 6.2 ounces of dried buds off my first cannabis plant I grew using this system (pictured below in flowering section) but to get those kinds of results you need to train your plant and invest in more CFLs as the plant get bigger to make sure there aren’t any shadowy areas.
You will be growing your marijuana plants indoors in a soil-less medium called Coconut Coir (often called coco coir, or even just coir). Coco coir is a natural fiber made from the husk of coconuts that naturally stimulates the roots of plants and is forgiving when growing marijuana.