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growing cannabis under t5 lighting

Growing cannabis under t5 lighting

However, you can use either type of lights during either stage and still get good results. People also use "Daylight" (5000K) bulbs with success.

A few years ago, growers usually only used fluorescent tube lighting as a supplemental light for cannabis plants, or for young seedlings and clones only.

T5 grow lights should be kept as close as possible without burning your plants.

With the new high output lights such as the T5, fluorescent lights can be used until the plants are about 24 inches tall, which is just enough to grow a very short plant through to the flowering stage when you control your marijuana plant's growth through the vegetative stage.

In general, I recommend changing to stronger grow lights like LEDs or HIDs for the flowering stage because they will usually give you double or more yields/watt of electricity. Unless you keep your plants very small, they will need more light to produce buds than a fluorescent light can usually produce. If you're in a dire situation where your plants have grown too big and you can't afford to get a different type of light, you can supplement your fluorescent tubes with additional light, for example you could supplement their light with a few CFL(compact fluorescent light) bulbs wherever you notice any "shadowy" areas. This is only a minor fix – the real fix is to grow very short plants or upgrade to a bigger light for the flowering stage.

The great thing about fluorescent grow lights is that they don't get very hot, and they can usually be kept 1-4 inches from the tops of the plants at all times without having to worry about burning your cannabis leaves or buds.

Some growers even use fluroescent grow lights such as the T5 successfully to flower their plants (if the plants are kept short/small enough through growth control methods).

For flowering, choose bulbs that are "Warm White" or "Soft White" colored (usually labeled as "2500K" or "3000K").

The biggest problem with fluorescent tubing is that the light that they give off is only useful for about a foot or so. That's why they're kept so close to your plants.

Growing cannabis under t5 lighting

But can someone tell me if this light is enough for my plants to bud? Im afraid I wont have enough light to fully grow 4 plants.

If I were you, I’d start reading up on LST, SCROG, or supercropping, then decide which route you want to go. Any of those will work well. The key, is keeping your canopy even, and your plant heigth down(preferrably less than 20"), allowing to keep you light as close to ALL the tops, as possible. That’s how ya get max yield, using tube fluoros.

Tran Dinh

Ill post pictures, some are of my plants currently, one shows the light. Oh and thats not where I’m officially growing, Ive built a grow room since.
By the way, how are they lookin??


Well, yes, you can grow some nice buds under T5’s, done properly, and. No, that’s not enough light for 4 plants. It’s enough for 2 plants, if you keep them small. Remember, light loses intensity very fast, which means you have to keep em as close as possible. I ran T5’s before, and didn’t have any trouble with heat, unless the plants actually touched the bulbs. So, I’d keep them at 1", or a bit closer, if you can. Also, when you do that, you’re not going to be able to fit 4 plants under that light, only 2, if they’re both about 12" wide(give or take a couple inches).

Growing cannabis under t5 lighting

To use T5 grow lights properly, there are a couple of things you need to know that will determine how successful you will be at growing under these lights. The first thing is how to choose the right T5 fixture and the right bulbs.

Different durations of light and darkness will affect how plants grow, whether they bloom or not, and other elements. – StephenVanHove / Shutterstock

Choosing the Right T5 Grow Lights

Bulbs: When it comes to choosing bulbs, there are even more options to choose from. Bulbs not only come in different energy varieties, but also in different color temperatures. When choosing between normal output (NO), high output (HO) and very high output (VHO) bulbs, I recommend going for the middle ones. HO bulbs are the best of both worlds—they are efficient, yet long-lasting, and will provide super-bright light for your plants.

Light Cycles

Light cycles tend to differ based on what plants are being grown under artificial lighting. For example, there are 12/12-hour cycles, 18/6-hour cycles and even 24/0-hour cycles of light/dark periods. To find the right cycle for your plants, I suggest either researching the needs of the variety of plant you’re growing, or basing your cycle on what the approximate light cycle would be if the plants would be growing outdoors during their season. Typically, more light means faster growth, which results in bigger plants and bigger yields no matter what you are growing.