The light from an HPS appears yellow, and is great for flowering plants because the light spectrum stimulates bud production
2.) High Intensity Discharge (HID) Grow Lights
Metal Halide (MH) Grow Lights
CFL grow lights are the twisty-looking bulbs you can find anywhere you normally buy light bulbs. They produce a great spectrum for growing cannabis and can be used in tiny spaces where no other grow light would fit such as the inside of a cabinet.
There is a larger size MH/HPS grow light available (1000W), but at that size it starts going outside the scope of a “hobbyist” grower as far as ease and yields. In addition to needing a lot of extra cooling which costs electricity, a 1000W HPS grow light is less efficient compared to a 600W grow light (as far as how much light is put out for electricity used). I think most hobbyist growers would be happier with a 600W, or even two 600W lights, over a 1000W
Full tutorial on CMH / LEC grow lights
(LEC stands for “Light Emitting Ceramic” and is a type of Metal Halide bulb that is built with ceramic like an HPS – basically it’s sort of like a blend between MH and HPS bulbs)
HIDs are very well suited to growing cannabis and very easy to use once they’re set up. If your main goal is to get the highest yields possible, then HIDs are the way to go! However, they do require extra setup compared to the other grow lights because chances are you will need a fan to vent out heat from your grow space.
Compare the Pros and Cons of Each Grow Light
Hydrofarm is back again with the Fluorowing Compact Fluorescent System. This model is designed for a small grow space of 2’ x 2’, with 125-watt bulbs. You will need to add additional reflective sheets for maximum efficacy, but this light is still decent for small spaces.
This warm fluorescent bulb is designed for flowering plants, potentially negating the problem that often occurs with CFLs during the flowering stage. Most growers use this bulb with a reflector to ensure the best distribution of light.
Fluorescent Lamp Cons
The FLCDG125D is CSA-certified and comes with a small reflector already attached.
4. Durolux T5 Grow Light (4ft) Dl844S Ho Fluorescent Hydroponic Fixture
You can buy this product in multiple versions. First off, you can choose between 2ft or 4ft lights. Then, you can decide whether you want two, four, or eight tubes. The EnviroGro bulbs have a sturdy, reliable construction and come pre-assembled. All you need to do is plug it in.
The brand offers a 1-year warranty on this product, and most customer reviews state that there have been no problems.
Growers recommend using this light in spaces that measure 3’x3’ or more. The reflector itself is 19” x 19” x 5”.
1. Hydrofarm FLC125W Compact Warm Fluorescent Bulb
If you’re looking for T5 bulbs, then this option is fantastic. The EnviroGro FLT24 T5 lights are a little more expensive, but we think they’re worth it.
Growers who have complex lighting set-ups using multiple lighting types often use fluorescent bulbs during the sprouting stage. Young plants respond well to these bulbs, but older plants sometimes require something more powerful. Sadly, you may get lower yields than if you used LEDs at a later stage.
Yes, you can use a T5 fluorescent light to flower a pot plant. The benefits of using this type of lighting is the lack of heat that they generate. Because they’re not super-warm, you can place your plant tops within just a few inches of the light. The disadvantage of flowering under fluorescent lighting is the lack of light intensity and penetration. This makes the Screen of Green (ScrOG) method ideal as you can train the flowering tops to create a level canopy close enough to the light.
Just wondering if you would use a T5 to flower a pot plant? – Raymond M.
T5 Fluorescent lights over motherplants.
My recommendation, however, is to grow under High Intensity Discharge (HID) lighting such as High-Pressure Sodium (HPS) or (Metal Halide) systems. Although they run much hotter and use more electricity, they produce plenty of light for plants to thrive and build thicker flowers. If you’re interested in a bigger yield from increased light and can handle the added heat, HID lighting is ideal for indoor marijuana production.