How Many Plants For A 1000 Watt HPS

Last Updated on October 30, 2022 by Cinthia

When starting out growing various plants indoor, different questions may pop out of your mind. Questions such as how many plants are required for a 1000 watt high-pressure sodium, HPS.

Every grower wants to maximize their yield after all the hard work they put into their indoor garden. Supplying your indoor plants with light is very essential for their development. HPS lights have been in existence for almost 50 years and they have been providing light energy for indoor plants growing needs.

Now, it is crucial you get the right plant coverage for the particular bulb wattage you have. This is why we are going to be looking at how many plants are required for a 1000 watt HPS. We will also be looking at other grow light plant coverage for 1000w. So, read on to find out.

How Many Plants For A 1000 Watt HPS?

The light wattage will decide how much area or the coverage area you can light up. So, how many plants for a 1000 watt HPS bulb should be around 5 by 5-foot area or 25 square feet.

Even though everyone has their methods, it all balls down to what method works for you. Some growers have boasted of growing about 6 to 9 plants using 1000 watt HPS. Some even grow smaller plants while using the SCROG and SOG technique to manage space.

How Many Plants For A 1000 Watt HPS - Scrog and Sog

How Many Plants Per 1000 Watt Light?

Various grow lights will have their coverage capacity with a 1000 watt light per plant. Let’s take a look at some 1000 watt grow lights and their plants’ coverage capacity:

·         1000 Watt LED Grow Light Plant Coverage Capacity

1000 watt LED grow light plant coverage capacity will also be around 5 by 5 foot area or 25 square feet. You should also take note of the quality of the LED grow light you’re using as some lights are more efficient than others. There are also different brands that will offer different benefits to your plants.

Another important thing to note is what is actually meant by a 1000 watt LED. The meaning of 1000 watt LED is referred to as the equivalent of 1000 watt HID light. The only difference is that this LED light doesn’t consume up to 1000 wattage power.

We have what we call LED actual wattage and labeled wattage. The labeled wattage of LED grow light is the one written in bold words by the manufacturer. The actual wattage is the actual wattage number the LED light draws from power and it’s not usually up to the labeled value.

SPIDER FARMER SF-1000 LED Grow Light Use with Samsung LM301B LEDs

For instance, a 1000 watt LED grow light actually wattage maybe around 500 to 700 watts but will give you an output that almost equals a 1000 watt HID. You can find the actual LED wattage value if you dig through the manufacturer manual.

Thus, this shows that LED grow lights are more efficient by offering you more benefits while saving you power consumption. So, the coverage area of LED actual wattage 500 to 700 will also be 5 by 5 foot area.

·         1000 Watts For Other HID Grow Light Plant Coverage

We have looked at how many plants for a 1000 watt HPS will be. So, let’s discuss other 1000 watt HID bulb plant coverage (such as CMH and MH).

The difference between HID light coverage and LED light coverage is not so much. 1000 HID watt coverage offers roughly a close range of coverage area the only difference is the HID reflector used.

Umbrella reflectors for instance will offer you a big light coverage area. However, the light intensity will not be so great. Other focused reflectors such as a hood will offer you a smaller coverage area with more light intensity.

1000 Watts For Other HID Grow Light Plant Coverage

Taking a look at the types of HID bulbs we have, here is their plant coverage capacity:

Ceramic Metal Halide (CMH): even though 1000 watt CMH bulbs may be scarce (the common watt seen is 315w), the ones that are actually 1000 watts will have plant coverage of about 5 by 5 feet area.

Metal Halide (MH): for a metal halide bulb, the plant coverage is about 7 by 7 area foot for vegetative growth. While for the flowering phase, the coverage area is about 5 by 5 feet. However, we recommend not using a metal halide bulb for the flowering phase. You should rather use HPS grow light for the flowering phase if you want big buds and yields.

How Many Plants Per Light: Factors To Consider

Now, talking generally about the number of plants to be grown per grow light, we would say 1 to 8 plants. Make sure you don’t grow more than this number so you don’t limit your yields.

Following the right numbers of plants to grow per plant will give your plants a good chance to flourish thereby resulting in good yields. However, if you grow more than 8 plants using a single grow light, your plants won’t receive adequate light and space.

Here are other factors to consider when deciding how many plants to be used using each grow light:

Power of Grow Light: you should also note that the power of your grow light will also be another determinant of how many plants you can grow using one grow light.

Condition of Grow Space: another factor to consider when deciding how many plants to grow per light is the condition of your grow space. If your grow space already a bit receives natural light, then a not so strong grow light will be fine. You can even place your grow light higher to increase the coverage area.

Plant Growth Stage: the stage your plant is will also have a determining factor on your plants’ coverage area.  Some flowering plants require high light intensity, thus, a 5 by 5 feet coverage area should be ideal for 1000 watt light. On the other hand, vegetative plants such as lettuce can allow you to hang your light higher for bigger coverage. You can use a coverage area of 7 by 7 feet for veggies plants.


How much area does a 1000 Watt HPS cover?

It isn't set in stone, but the amount that it covers is thought to be around 49 square feet.

The best way to calculate how much area you will be heating with a HPS is by looking at the Watts. The power rating of your HPS (1000W) is divided by the number of hours in a day and the number of days in a year. If you are heating with a HPS for 24 hours a day 365 days a year, the area you are covering is about 1.5 acres.

The more you put distance between the light and the walls and ceiling the less wasted energy you will have.

How many plants can I grow with 1000 Watt HPS?

The answer is that it depends on how much light you are using, how much space you have and what your plants require. For instance, let’s say you have a 10′ x 20′ growing area. If you only use 4″ of light, you can grow about 15 plants.

This means you would need 2 bulbs to cover this area. But if you were to use 8″ of light, you could grow 50+ plants in this space. So, you could easily grow up to 200 plants with 8″ of light and a 1000 watt HPS bulb. Let’s take this one step further. Say you have a 2000 watt HPS, you could grow 500+ plants in this space. So the bottom line is you can grow just as many plants with a 1000 watt HPS as you can with a 2000 watt HPS.

So, it gets a bit tricky. The first thing you need to determine is how much light you will need. The number of plants you can grow will depend on the amount of light you have available.

How far should 1000 Watt HPS be from plants?

You should be at least one meter away. But, if you want to go further, go ahead.

What LED is equivalent to a 1000w HPS?

Black Dog PhytoMAX-2 could be easily considered an equivalent. The only issue is thet they are very expensive, and for this reason very few people go for them.

How much does it cost to run 1000 watt HPS?

You can get a 1000Watt HPS for $0.90/hour. However, you will need to do some research to find the right model and wattage, as well as getting a supply voltage of around 110V. I would recommend finding a manufacturer like Noctua or CLC or XSPC that makes HPS units for your particular requirements and then order online.

How Many Plants For A 1000 Watt HPS: Final Say

Now, we have learned that how many plants for a 1000 watt HSP should be around 5 by 5 foot coverage. Other grow lights will also use a similar coverage area for a 1000 watt light.

So, we hope this post has been able to enlighten you on deciding your plant grow light coverage.