You probably won’t need an exhaust fan for cooling in this setup, but if you don’t have an exhaust fan you can’t use a carbon filter, which means you won’t have a great way to prevent smells from leaking outside your grow space.
LEDs are the newest addition to the cannabis grow light lineup (though they’ve been around for years), and they look to be the direction that lighting is headed in general. Aside from the allure of their newer technology, they are great at growing cannabis and the units themselves can last a very long time. In fact, the one we recommend can last 100,000 hours; that’s over 14 years if you harvested every 15 weeks!
Estimated Cost: $589 plus the cost of seeds
pic by Joe “Nunyabiz” Nunya, an avid LED grower who uses ViparSpectra LED
Cons: Expensive, easier to burn plants when not used correctly
The downside to CFLs is they aren’t great for flowering plants, and growers will usually use another type of light to finish plants. CFLs just don’t generate enough intense light for plants to pack on weight.
CFLs (compact fluorescent lamps) are fluorescent lights similar to what you’d find in a school or office building, but smaller. For growing weed, they are usually called “T5s”—the “T” stands for “tubular” and the “5” refers to its diameter, “⅝”.
These fluorescent lights are cheap and efficient and great for vegetative growth. They’re especially great for helping along germinating seeds and small seedlings because they don’t put off much heat and won’t scorch the delicate seeds. They won’t run up your electricity bill too much.
Power equals poundage, so if you want big yields you’ll need more wattage. Professional LEDs can start at as little as 200 watts, and go up from there. A high-watt light can double the work of several low-watt bulbs.
Best HID grow light brands
For HIDs, light occurs as an arc between two nodes inside the bulb. The gas contained in these bulbs is what makes MHs and HPSs different. HID bulbs are usually more expensive than the reflective hoods that hold them.
How big a light you need will depend on the number of plants you plan on growing, but also on the size of your space. If you’re growing in a closet or a small grow tent, you’ll only be able to fit one small light in there. If you have a wide open basement, you could invest in a bigger light as opposed to two smaller ones.
One of the crucial elements a cannabis plant needs is light. During photosynthesis, a plant converts light energy into chemical energy, allowing it to grow strong and healthy, and with cannabis in particular, light also fuels bud production.
MH (Metal halide)
Here are a few different CFL grow lights at different price points.
Make sure you have enough outlets and power available in your breaker board for your grow space to comfortably accommodate all equipment. Figure out all pieces of equipment, such as lights, fans, possibly an AC or dehumidifier, and calculate how much power they’ll require. You’ll be running this equipment every day for months, so if you don’t have enough power it can be dangerous. Never overload an electrical outlet.