How many watts do you need to grow plants?

Asked By: Romaissa Frohlich | Last Updated: 18th April, 2020
Category: home and garden outdoor decorating
4.5/5 (656 Views . 20 Votes)
Plants and especially cannabis need most lighting during the flowering stage, so we`ll be using that as an estimate of how much area needs to be covered. A standard LED grow light must use more than 32 watts per square foot of grow space, but for optimum results it should be over 50 watts, up to 80 watts.

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Considering this, how many watts do I need for 4 plants?

Recommended assuming 4.0 sq ft/plant

# of Plants Square Feet Wattage from Wall
2 8 240 to 300 watts
4 16 500 to 650 watts
6 24 700 to 860 watts
8 32 900 to 1100 watts

Subsequently, question is, do watts matter when growing? A good rule-of-thumb for LED grow lights is 32 watts of actual wattage per square foot of growing space for flowering medical or other large flowering plants. Low light plants, such as herbs and lettuces require about 11-18 watts per square foot of grow space.

Furthermore, how much area does a 1000 watt grow light cover?

7x7 feet

How many plants can I grow with a 300w LED light?

Grow Space Size Minimum Number of Watts Required Number of Plants You Can Grow
6 sq ft (2×3) 300w 1-6 plants
9 sq ft (3×3) 450w 1-9 plants*
12 sq ft (3×4) 600w 1-12 plants*
16 sq ft (4×4) 800w 1-16 plants*

34 Related Question Answers Found

How many plants can you have under 1000w?

Everybody has their own way and in the end it comes to what works best for you, but I have read that most of the people use 6-9 plants per 1000W, while in the other hand other people like to have more smaller plants, hence the sog and scrog method. For example, SeeMoreBuds had about 50-100 plants per 1000W.

How many plants can I grow with a 600w LED light?

Sixteen plants that are grown under a 600-watt HPS lamp could produce about 37.5 grams or 1.3 oz of marijuana per plant. Under perfect, outdoor conditions, you can expect yields to extend to 500 grams or 17.5 oz per plant.

What size tent do I need for 2 plants?

2' x 4' Grow Tent - Fits in most closets (2-4 plants) 3' x 3' Grow Tent - Ideal for people with a limited work area (2-4 plants) 4' x 4' Grow Tent - Perfect for the footprint of a 1000w HID or LED grow light (4-6 plants) 5' x 5' and 4' x 8' Grow Tents - Our most popular tent sizes (4-10 plants)

What size tent do I need for 4 plants?

As a general rule, light in 600-1000 Watts is ideal for 4 full grown plants. The number of lights you can run inside the tent will determine the number of plants you can grow as one grow light is good for only a certain number of plants.

How many plants can fit in a 4x4 grow tent?

Well, the style and number of plants to grow in a 4×4 size really depend on the way you're training your plants, the strain and so on. If you're growing SOG: 4–16 plants per m2. If you're growing Pruning: 1 plants per m2. If you're growing with low-stress training: 4 plants per m2.

How many lumens does a plant need?

The optimal light would be 7000 to 7500 lumens per square foot. If the plant only requires minimum lighting, it should be approximately 2000 lumens per square foot. For the mid-range measurement, it should be approximately 5000 lumens per square foot.

What size LED light do I need?

Taking into Account the Size of the Grow Space
A standard LED grow light must use more than 32 watts per square foot of grow space, but for optimum results it should be over 50 watts, up to 80 watts.

How far should a 1000 Watt HPS light be from plants?

So, for example, a 1000w HPS distance from plants for bloom would start at 36 inches and gradually move closer.

How much does it cost to run a 1000 watt light per month?

Grow Light Operating Cost
1000 watt Sodium 600 watt Sodium
Ballast Wattage 1100 665
Cost per Month $52.80 $31.92
Initial Lumens 130000 89000
Mean Lumens 126000 81000

How many lights do I need to grow 12 plants?

the general rule of thumb is 25-50 watts of light per square foot, you have 100 sf, so you need 2500-5000 watts of light. Check out the led forums here, they seem to be the way to go, especially if heat is an issue.

What lights do professional growers use?

HPS lights and T5 lights are used by the majority of growers (68% and 67%, respectively) during at least one growth stage, and LEDs are used by more than a quarter of cultivators.

How far should my LED light be from my plants?

The G8LED 240 Watt LED Grow Light is for 2-4 mature plants, with a distance of 12-24 inches from the top of the canopy. The larger G8LED 450 Watt LED Grow Light is for 4-8 mature plants, with a distance of 14-30 inches from the plant canopy. These lights also work well for mother plants and cloning.

How far away should grow lights be from plants?

TIP: Place grow lights directly over plantings to mimic natural sunlight. As a rough guide, incandescent grow light bulbs should be at least 24 inches over your plants. Fluorescent and LED lights have a lower heat signature, so they can be placed 12 and 6 inches over plants respectively.

Can you have too much light in a grow room?

Although too much light can impede plant growth, it's also a fairly easy problem to fix. There are a couple of common methods for remediating a too-bright greenhouse. Plant burn often comes about when plants are growing too close to the main source of light and heat.

How many 1000 watt lights can I run?

A 1000w HPS or Metal Halide light takes 9 amps at 120 volts so you can only run one on a wall outlet circuit. A standard dryer outlet is 220 volts and 30 amps so you can power up to six 1000 watt lights on that circuit.