# How many watt LED grow light do I need?

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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.

## How many watts do LED grow lights use?

The average LED grow light draws about 32 watts to cover 1 sq ft for flowering. Compare this to a typical HID fixture which rings in at 40 watts per square foot (assuming a 5′ x 5′ area, or 25 sq ft coverage area).

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

So 300W can coverage about 2*3ft area, in general, each cannabis plant you grow requires at least 1sq ft of space. So under 300W, you can grow about 1-6 plants.

## How much area does a 1000 watt grow light cover?

These lights range in power from 100 to 1000 watts. The 400 and 1000 watt lights are the most useful. A 1000 watt grow light can light up an area of about 7 feet square when the light is suspended 2 feet above the plants. A 400 watt light would work for an area of about 4 feet square.

## How many plants can I grow with a 1000w LED light?

How Many Plants Can I Grow?

Grow Space Size Minimum Number of Watts Required Number of Plants You Can Grow
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*
20 sq ft (4×5) 1000w 1-20 plants*

## What size LED light for 3×3 grow tent?

You should shoot for 350 watts in a 3×3 tent. I would avoid amazon led lights. They are low priced and low quality, or in some cases high priced and low quality. 700 is going to be tough if you are looking for a light ready to go.

## How much does a 1000w LED cost?

You need to divide your wattage by 1,000 (1,000 kilowats in 1 watt). So, if we were to run a 1000 watt grow light 18 hours a day with the kWh rate we gave earlier, our formula would be: 1 x \$0.1559 x 18 x 30 = \$84.186/month.

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

2 month plants should give about 40g per plant, so with about 9 you’ll be able to easily fill a square meter and get up to 400g per 600w light. 3 month autoflowering plants grow much bigger, however, so you should only plant 4 per 600w light.

## What size LED light for 4×8 grow tent?

This implies in future vegetation period, your 4 x 8 grow tent will require an LED grow light bulb size of at least 800W, or you may combine multiple LED lights which will total to 800W.

## Are COB lights better than LED?

But the difference between LED light COB and SMD is that COB LEDs have more diodes. COB chips typically have 9 or more diodes. … Another aspect of the COB vs SMD LED Lights difference is in the use of energy. COB is known for better lumen-per-watt ratios and heat efficiency.

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## What size LED light for 5×5 grow tent?

For a 5×5 tent, it’s best to use about 1000 watts (High-Pressure Sodium) lights. HPS lights appear to be yellow in color, but these have the color spectrums yellow and red. Both spectrums are great for flowering plants. However, this doesn’t mean that HPS can only be used for flowering plants.

## How much does a 1000 watt LED yield?

Your yield from a single 1000w lamp is generally about 2 Lbs per harvest. Sometimes lower, 1.5 Lbs or sometimes higher, 2.25Lbs max for me.

## 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. … Experts recommend 100 watts of light for a 2 foot by 2 foot grow area, up to 1,000 watts for an 8 foot by 8 foot area.

## Can police detect LED grow lights?

Police IR helicopters can see the heat pouring out like a fountain. The helicopters CAN NOT see through your walls and detect your grow lights. They can only see heat on the outside of a building. So if your growroom is insulated and the lights are not touching the walls you are fine.

## How many LED grow lights for a 10×10 room?

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.