Lights Used For Growing Weed

The type of light you use to grow weed can make quite the difference, so having the right one for your purposes and your specific setup is a big deal. There are many different kinds of lights out there which can be used for growing weed, each of which have their own advantages and disadvantages. Let’s get to it and figure out what lights to use to grow weed.

Fluorescent Grow Lights: What Lights to Use to Grow Weed

The first main kind of grow light used for growing weed is fluorescent light. Many people prefer to use these because they come in many different shapes and sizes. This allows you to choose the right size to fit your needs.

For example, you can get the twisted fluorescent lights that are small and compact, making them ideal for tight grow rooms where the bulbs need to be close to the lights. The T5 fluorescent lights are also a good choice as these are the classic shaped tubular grow lights that can be hung from a fixture, which are great for larger areas.

Fluorescent lights produce quite a bit of light, they have the full spectrum of light being emitted, they don’t get hot so they won’t burn your plants, they are energy efficient, and they don’t cost much to buy either. This is a good choice for beginners to go with.


  • Fairly cheap to buy
  • Quite energy efficient
  • Good spectrum for various growth stages
  • They work well for shorter/smaller grow rooms because they can be kept close to plants
  • Great lights for clones, seedlings, and young plants


  • Comparably small yields.
  • Not ideal for tall plants in the flowering stage.

HID Lights – High Intensity Discharge

These odd shaped bulbs tend to be a lot stronger and more efficient than their fluorescent cousins. These guys put out a lot of light, and are often screwed into a reflector hood to get even more light concentrated towards the plants. HID lights do get very got, so they need to be vented to prevent the overheating of the grow area.

There are 3 main types of HID lights. One is the metal halide light which produces mostly blue light, thus making them ideal for the vegetative state. The second is the high pressure sodium HID light (HPS). HPS lights tend to get the best yields than any other light, plus they have a great yellow light used for the flowering stage when buds are developing. The third kind is the ceramic metal halide bulb, which is more efficient than the metal halide bulb, but not as efficient as the HPS bulb.


  • Very efficient
  • Best yields
  • Awesome for growth during the flowering stage
  • No need to constantly adjust the height of the light
  • Simply screw them in, hang them up, and turn them on


  • They get really hot – can burn your plants or heat up the space too much
  • Require some kind of venting mechanism to deal with excess heat
  • There are a lot of parts that are involved with these lights

LED Grow Lights

Many people love to use LED lights thanks to their simplicity. They tend to be fairly energy efficient, they have decent yields, they don’t get too hot and often come with integrated cooling, and they are also very easy to use. Keep in mind, while they are cooler than HID lights, they are hotter than fluorescent lights.

They often need to just be hung up and plugged in. LED lights don’t get quite as good a yield as the above HID lights, but they do provide for better yields than fluorescent lights. LED lights can be used for all growth stages as they tend to vary in their light spectrum which they produce. You can get blue, red, or a combination of both spectrums, which is great for growing weed.


  • LED lights do not get too hot
  • They often come with cooling
  • Simply plug them in and hang them up
  • They help to produce really resinous bud
  • They are fairly good with energy use
  • Yields are moderate


  • LED lights usually need a lot of space from the bulb to the plant to prevent light burn
  • Smaller yields than HPS grow lights
  • Larger LED lights may still require venting


All of the above lights work for growing weed, but they do differ, so be sure to weigh your options and make a choice that is right for you.

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James Alexander James Alexander
Hey, I'm James! The founder and head writer here at I started this site to share my passion and knowledge of all things cannabis. I used to work as a budtender in central Amsterdam, and have over 7 years of growing experience.

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