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what watt light bulb for growing weed

Aside from the price of the actual light, also take into account utilities—all lights will add to your electricity bill every month, but some more than others. High-intensity discharge lights—known as “HIDs”—may be cheaper to buy but can gobble up electricity, whereas LEDs are more efficient and kinder on your electricity bill but usually more expensive to buy.

Other considerations when choosing a cannabis grow light

LEDs also typically run a lot cooler than HIDs, so you may not need extra equipment to cool down your grow space, and one LED can usually be used for both vegetative and flowering growth. Some high-end LEDs allow you to change the spectrum for each growth stage.

Best CFL grow light brands

There are many types of lights, but below are the four most common you’ll find in a grow room. There are many variations within each of these four types as well, and new lights and technology come out all the time.

What watt light bulb for growing weed

For growers who are looking to harvest 1/2 to 1 ounce of cannabis a month, LEDs may be your best choice. At this size, they are super low on electricity, run cool and need almost no setup! They get better yields than fluorescents but don’t run as hot as an HPS of similar wattage.

T5s are much bigger/wider than CFLs and usually come as part of a panel, but they can still be kept mere inches away from your plants without worrying about burning them.

Example of MH/HPS Setups That Yield 1-5 Ounces/Month

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)

1.) Fluorescent Grow Lights

More Light = Bigger Yields!
(up to a point, it is possible to give your plant too much light!)

Pros and Cons of HID Grow Lights

LED grow lights are very popular among cannabis growers as an alternative to HPS grow lights. They tend to run cooler and also usually come with built-in cooling. They can often be plugged into a wall and simply hung over plants which is definitely easier than setting up an HID grow light. LEDs also have great penetration so they don’t need to be moved frequently like fluorescents.

Simply hang an LED light over your plants and start growing!

What watt light bulb for growing weed

Seedlings will thrive with lower PAR around 200-400 while established vegging plants need 400-600 depending on maturity level: young plants can do well under 600 whereas mature ones usually require 800.

Using PAR values instead of wattage lets you find out how much consumable light your plants are getting. This makes it more important when looking at lights not just to know their wattages but also what type and strength of wavelength they emit in order to make sure there’s enough available food energy. Having higher PAR output can even speed up the grow time and give you an earlier finishing grow.

Here we’ll talk about what wattages of bulb work best when trying out different strains with low-stress training techniques as well as some other things one should be careful not overlooks while selecting lighting fixtures for their setups such as heat production or electricity usage.

If a plant is flowering, then it should definitely have 600+ PAR to help provide adequate energy to the plants.

PAR Output:

When you’re looking for a grow light, it’s easiest to use the watts as a metric to help judge if the grow light will be sufficient for your growth.

Popular Strains of 2021:

When you’re using lights to grow weed like in an indoor weed grow or especially a closet weed grow, then having more wattage will generally mean more growing power and could lead to a higher-yielding indoor grow.

How To Calculate How Much Wattage You Need For Your Grow:

Watts are broken down by how much electricity your lighting consumes (AKA how much you pay for your electric bill) and the amount of light your lighting outputs (The overall power of the light bulb).

PAR, which stands for Photosynthetic Active Radiation, is a scientific term for the light wavelengths that your plant actually uses to grow (photosynthesis).