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led or cfl for growing weed

CFL grow lights are best suited to small or short spaces. Fluorescent lights like CFLs and T5 grow lights have the unique ability of being able to get up close to cannabis plants without burning them. In fact, for the best results, you should keep CFLs only a few inches away from the tops of your plants. Basically, if you are comfortable putting your hand where your plant is for 30 seconds, it means the CFL is far enough away. This makes CFLs ideal for grow spaces where room is extremely limited, for example when you only have a few feet of height.

LEDs get better yields for the same amount of electricity than CFLs. This is because LEDs are more electrically efficient (produce more light for the same amount of electricity)

LEDs vs CFLs

Led or cfl for growing weed

The only real risk CFL bulbs pose is if you smash them. When that happens, the mercury vapor escapes and it could pose a risk to you, other humans, and pets. If you break a CFL bulb, be sure to keep kids and pets away, open the windows, and don’t vacuum. The Environmental Protection Agency provides a very helpful guide to cleaning up broken fluorescent bulbs.

Compact fluorescent light bulbs do contain a small amount of mercury, and mercury can be dangerous. On the plus side, manufacturers have drastically decreased the amount of mercury they use in CFLs and are trying to reduce that amount even further.

Aside from the finer points of nailing down your supplemental lighting game — distance from the plants, the quality and spectrum of the light, lighting schedules and timers — perhaps the best place to start your journey is with the bulbs themselves. While you can park a plant in a window and let it do its thing, if you want to coax your indoor plants into optimal productivity and yields, supplemental lights are the way to go.

Compact fluorescent light bulbs use a combination of argon gas and mercury vapor to produce light. When exposed to an electric current, the argon and mercury combination generates an invisible ultraviolet light. This light hits a fluorescent coating on the inside of the tube, and voila, visible light.

Are CFL bulbs dangerous?

Unlike high-intensity discharge (HID) lights that are often used to grow cannabis, CFL bulbs don’t need special fixtures or setups — they will screw into any lamp you already have for incandescent bulbs. This — combined with the fact that they don’t generate a ton of heat — makes CFL bulbs good for small grow spaces. CFLs also come in a variety of temperatures, meaning you can adjust to the plant’s need in the vegetative and flowering stages of growth.

On the flip side, you will need to adjust your setup regularly as your plant grows. CFLs have a limited range of efficacy, and the plants need to stay fairly close to the bulbs. Do the “back of the hand test” by holding your hand over the top of the plants for 30 seconds to see if it’s too hot, but generally speaking the sweet spot is about 4 to 5 inches between bulb and plant.

Finally, CFL bulbs require the smallest initial investment compared to HID and LED setups. When thinking about electricity bills, CFLs are the middle of the road when compared to expensive HID lights and inexpensive LED lights.

Can you still buy CFL bulbs?

We’ll get into the shifting legal landscape of CFL bulbs in a minute, but generally speaking, CFL bulbs are still pretty easy to find at local hardware stores and even grocery stores in most states.

CFL cons include that they:

Led or cfl for growing weed

Great info, i was already doing what you described, with the cfl,s. You just proved my instincts right..thanks

You can choose how your plant grows. Weed plants grow upward into a Christmas tree shape naturally, but that is not good for us. This results in one large bud at the top and several smaller buds below.

The problem is that fluorescent bulbs do not have great penetration. That is why you hang them so close to the pants. With fewer powerful bulbs, you have to hang them further away and are more likely to get shadows. More bulbs that are less powerful allow you to hang them close and to completely bathe your plant in light.

Where do I get CFL bulbs?

Must say, whilst the quality of bud was always good, the yield was pathetic (Avg 100g per plant). I’ve switched to a 600W HPS and current grow looks 5-10 times better.

Jennifer Cole says

Sounds like a good setup.

Where Do I Put The Compact Fluorescent Bulbs?

This article covers how to figure out how much light you need with LEDs:

They are extremely flexible and let you mount the lamps anywhere you like and in any position you like. Alternatively, you could put them in a reflector (or just rig up your own), to direct more of the light in the direction you want, i.e. at your plants.