Grow Room Light Calculator

One question mostly asked by hydroponic growers is how do I calculate my grow room light? It’s really quite easy to go about this when you have access to the right knowledge. So, this is why we’re going to be giving you the actual grow room light calculator to go about this.

Determining the appropriate light your grow light can cover is important so you can plan properly to get the best yield. Light is directly associated with production or yield, therefore, a feeble light will definitely not suit your plants’ growth.

We will introduce you to various ways to evaluate your grow light coverage using grow room light calculator. So, continue reading to learn about this.

Grow Room

A grow room is a space where different types of plants can be grown and the growing conditions can be controlled. In a grow room, plants can be grown using grow lights or sunlight, artificial nutrients solutions, soil or non-soil medium, and so on.

Setting up your grow room will require proper planning and putting the right things in place. One of the most important things to put in place is the grow light and it’s crucial you get the right grow room light coverage.

Grow room

Grow Room Lights Calculator

Grow room light calculator will help you determine the cost of power you will be using during the period of use. There are different ways or tools you can use in evaluating your grow lights’ power consumption. The calculator can be used for most grow light fixtures such as LED CMH, MH, CFL, and HPS.

To evaluate your grow room lights you will need to know some important parameters such as PPF (Photosynthesis Photon Flux) and actual wattage. These parameters are usually listed on the manufacturer’s info of your grow light.

Photosynthesis Photon Flux (PPF)

The entire amount of light in the PAR (Photosynthetic Active Radiation) zone that is emitted by a particular light system every second is known as PPF.

Basically, what this means is that PPF calculates the photosynthetic active photons produced by a light source every second. It is measured or expressed in micromol per second.


The amount of electricity or power pulled out of or consumed from the wall is known as wattage (w). When we talk about wattage, there is a difference between actual wattage and the labeled wattage.

In a grow light packing, you will likely come across the labeled wattage number that will b boldly seen. However, this may not be the actual wattage. What we need to evaluate grow room coverage is the actual wattage and this can be found if you dig through the information provided by the manufacturer’s data.

Apart from photosynthesis photon flux and wattage values, there are other parameters you can use in calculating the grow room light coverage. So, you can always calculate the grow room light depending on the information you have.

Using Grow Room Light Calculator

To determine the grow room light coverage, simply input your data and use these calculators to evaluate your results:

Note that the grow room light calculator mentioned above is just to have an estimate. Thus, the results that you will get are not the exact evaluations.

Factors To Consider For Grow Room Coverage Calculator

To make your evaluation further accurate, you should put these factors into considerations:

  • Determine the size space or grow room size you will be growing in.
  • You should also ensure the grow light you will be using adequately covers your grow space with adequate light. That is the grow light efficiency should be optimal.

VIVOSUN 48” x 48” x 80” Hydroponic Mylar Grow Tent with Observation Window and Floor Tray

Calculating LED Wattage Of A Grow Room

Let’s determine the LED grow light size you will be needing for a particular grow space so your plants can grow excellently. So, to determine this, we need the value of grow light in watt and PAR or PPFD levels.

Even though we use wattage as one of the criteria to determine the power of light, it is not the main deciding unit. The determining factor of light will be the amount of usable light that is able to reach each square foot of your grow area or space.

In general, the main objective for LED panels should be 32 wattages per square foot of a growing area. This will increase your chances of getting excellent plants growth results.

To evaluate the actual value of wattage needed for a grow room, first determine the size of your grow room. Then go ahead and multiply the value with your desired PPFD range. Then divide the output by the PPFD per wattage of your LED grow light.

You should however note that watts are not the only determiner of your coverage area. Wattage should generally be used for determining the appropriate light fixture size for your grow room. Only use wattage as guidance to evaluate how much power your grow light can offer per square foot of a grow space.

Calculating LED Wattage Of A Grow Room

For this reason, PPFD (Photosynthetic Active Radiation) and DLI (Daily Light Integral) are the right units for determining the light intensity of a particular grow space. DLI which is Daily Light Integral calculates the total amount of light a plant gets per day. It is measured using the number of moles of photons per square meter daily (mol/m2/d).

Final Say On Grow Room Light Calculator

Grow room light calculator will help you evaluate the light intensity required for a specific grow space. This will help you plan ahead and give your plants the appropriate requirements for your plants to grow excellently.

So, you can simply go through our post to learn about grow room light calculator. We hope with the help of our grow light coverage calculator, will help you plan and determine the required grow light coverage of your space.