# Greenhouse Lighting Calculator

## What is a Greenhouse lighting calculator?

A greenhouse lighting calculator is a tool that helps greenhouse growers determine the amount of lighting that their greenhouse needs in order to support the growth of their plants.

Greenhouses are used to grow plants in environments where natural sunlight may be limited, and plants rely on light in order to photosynthesize and grow. Therefore, it is important for greenhouse growers to ensure that their greenhouse has enough lighting to support the growth of their plants.

A Greenhouse lighting calculator can help greenhouse growers make informed decisions about the lighting setup in their greenhouse and ensure that their plants receive the light they need to thrive.

## How to use a Greenhouse lighting calculator?

Here is a step-by-step guide to using a greenhouse lighting calculator:

1. Determine the dimensions of your greenhouse. Measure the length, width, and height of your greenhouse in feet or meters.
2. Determine the type of plants you will be growing in your greenhouse. Consider the specific species and stage of growth of your plants, as different plants have different lighting requirements.
3. Determine the location of your greenhouse. This can be helpful for determining the average amount of sunlight that your greenhouse receives throughout the year. You can use the latitude and longitude of your greenhouse to determine this.
4. Determine the type of lighting that you will be using in your greenhouse. There are several types of lighting that can be used in a greenhouse, including fluorescent, LED, and HID (high-intensity discharge) lights. Each type of light has its own benefits and drawbacks, so it is important to consider which type of light will be the most suitable for your greenhouse and your plants.
5. Determine the intensity of the lighting that you will be using in your greenhouse. This is typically expressed as a percentage, with higher values indicating a higher intensity of light.
6. Use the greenhouse lighting calculator to input the above information. The calculator may have input fields for each of the above pieces of information. Simply enter the appropriate values in each field.
7. Submit the form and let the calculator do the rest. The calculator will use the information you provided to calculate the total amount of lighting that your greenhouse needs in order to support the growth of your plants.
8. Review the results of the calculation. The calculator will display the total amount of lighting needed in watts or a similar unit. Use this information to determine the number and type of lights that you will need to provide sufficient lighting for your greenhouse.
9. Set up your lighting according to the results of the calculation. Install the appropriate number and type of lights in your greenhouse, and adjust their intensity as needed to achieve the desired level of lighting for your plants.

By following these steps, you can use a greenhouse lighting calculator to determine the lighting needs of your greenhouse and set up a lighting system that will support the growth of your plants.

## Greenhouse lighting FAQs

### 1. How much lighting do you need for a greenhouse?

The amount of lighting that a greenhouse needs will depend on the specific plants being grown and the stage of growth, as well as the location and size of the greenhouse. A greenhouse lighting calculator can help you determine the specific lighting needs of your greenhouse based on your specific inputs.

### 2. What is the formula for calculating lighting?

The formula for calculating the total amount of lighting that a greenhouse needs will depend on the specific user inputs that you have included in your calculator. For example, it might be calculated as: Total Lighting (in watts) = Greenhouse Area (in square feet) x Lighting Requirements per Square Foot (in watts per square foot) x Intensity of Lighting (as a percentage).

### 3. How do I choose the right light for my greenhouse?

There are several factors to consider when choosing the right light for your greenhouse. These include the type of plants being grown, the stage of growth, the location of the greenhouse, and the intensity of the light needed. Different types of lights, such as fluorescent, LED, and HID (high-intensity discharge) lights, have different benefits and drawbacks, so it is important to select the type of light that will be most suitable for your greenhouse and your plants.

### 4. Are LED lights good for greenhouses?

LED lights can be a good choice for greenhouses because they are energy efficient and can provide a full spectrum of light that is suitable for plant growth. However, it is important to consider the specific needs of your greenhouse and plants when choosing the right type of light, as LED lights may not be the best choice for all greenhouse applications.

### 5. Can you have too much light in a greenhouse?

Yes, it is possible to have too much light in a greenhouse. While plants need light in order to photosynthesize and grow, they can also be damaged by excessive light, particularly if it is too intense or if the plants are exposed to light for too long. It is important to provide the right amount of light for your plants, as well as to provide shade or other forms of protection from excessive light if necessary.

### 6. Is 12 hours of light too much for plants?

It depends on the specific plants being grown and their stage of growth. Some plants may require more light than others, and seedlings may require more light than mature plants. It is important to consult a plant care guide or a horticultural expert to determine the specific lighting needs of your plants.

### 7. How do you calculate outdoor lighting requirements?

The process for calculating outdoor lighting requirements is similar to the process for calculating lighting requirements for a greenhouse. You will need to consider the size of the area being lit, the type of plants or other objects being lit, the intensity of the lighting needed, and any other relevant factors. A lighting calculator or a lighting design professional can help you determine the specific lighting needs of your outdoor space.

### 8. How far should a 2000-watt LED light be from plants?

The distance between a 2000-watt LED light and plants will depend on the intensity of the light and the specific needs of the plants being grown. It is generally recommended to start with a distance of about 18 inches and adjust as needed based on the plants’ response. However, it is important to consult a horticultural expert or a plant care guide to determine the specific lighting needs of your plants and the appropriate distance for your specific setup.

### 9.Should a greenhouse get morning or afternoon sun?

The best time of day for a greenhouse to receive sun will depend on the specific plants being grown and their light requirements. Some plants may prefer the morning sun, while others may prefer the afternoon sun.

### 10. How do you control the light intensity in a greenhouse?

1. Use shading or reflective materials to reduce the amount of light entering the greenhouse
2. Use curtains or blinds to block or redirect light as needed
3. Adjust the distance between the light source and the plants
4. Use a timer or a dimmer to control the duration and intensity of the light
5. Use different types of light bulbs with different wattage or intensities

### 11. What should you not do in a greenhouse?

1. Overwatering or underwatering plants
2. Allowing the temperature to get too hot or too cold
3. Using pesticides or other chemicals without proper protective measures
4. Allowing pests or diseases to go untreated
5. Planting too closely together or overcrowding plant
6. Neglecting to clean and maintain the greenhouse and equipment

### 12. Should you water a greenhouse everyday?

It is generally not necessary to water a greenhouse every day. The watering needs of plants in a greenhouse will depend on the specific plants being grown, the stage of growth, the humidity, and temperature of the greenhouse, and the soil moisture level. It is important to check the soil moisture regularly and water as needed, rather than following a rigid watering schedule.

### 13. What is the most efficient lighting system to replace sunlight in greenhouses?

The most efficient lighting system for replacing sunlight in a greenhouse will depend on the specific needs of the greenhouse and the plants being grown. LED lights are generally considered to be an energy-efficient choice, but other factors such as the type of light spectrum required, the intensity of the light needed, and the cost of the lighting system should also be considered.

### 14. Should you open your greenhouse everyday?

It is generally a good idea to open your greenhouse on a regular basis to allow for proper ventilation and to prevent excess heat and humidity from building up. However, the specific frequency of opening will depend on the weather conditions and the needs of the plants being grown.

### 15. How do you increase light intensity in a greenhouse?

To increase the intensity of light in a greenhouse, you can:

1. Increase the distance between the light source and the plants
2. Use a stronger or higher-wattage light bulb
3. Use a light source with a higher intensity or PAR rating
4. Use reflective materials to amplify the light

### 16. Why would you not water a greenhouse in the evening?

It is generally not recommended to water a greenhouse in the evening because the plants will not have time to dry off before nightfall, which can increase the risk of fungal diseases. It is generally best to water plants in the morning so that they have time to dry off before nightfall.

### 17. How often should you change greenhouse soil?

The frequency of changing greenhouse soil will depend on the specific plants being grown and their soil requirements. Some plants may require more frequent soil changes than others, and soil may need to be amended or replenished more frequently in a greenhouse due to the controlled environment. It is generally a good idea to regularly check the condition of the soil and make any necessary changes as needed.

### 18. What temperature is too cold for a greenhouse?

Some plants may be able to tolerate colder temperatures than others, and some plants may require additional heating or protection in a greenhouse during colder weather.