Before You Buy a LED Grow Light

An important factor to your indoor urban farming success is your lightning. Lightning can be used to supplement sunlight or as a sole source of light, to completely replace sunlight.  Some urban farmers, home growers, or professional growers choose to grow their crops in a well-lit room with a lot of windows that let through enough direct sunlight. However, on overcast days or when days get shorter, grow lights can be used to provide crops

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Plant Diseases & Pests

Evidence of plant diseases exists in fossils found from 250 million years ago. Big outspreads of plant diseases have been the reason for famines and other changes in the economy of nations throughout the history of mankind. Plant diseases and pests can cause big losses, resulting in a reduction in income for growers and higher prices for consumers. Find out more about different diseases, pests, and other problems.

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Efficacy, CRI & Power Factor

Efficacy Efficacy is also known as PPE, or Photosynthetic Photon Efficacy. Efficacy measures the amount of photons emitted by the grow light per input watt. You can calculate the efficacy (µmol/J) by taking the amount of PAR photon output (µmol/s) and dividing that by the input power (W). An higher efficacy means that the grow light is better at converting electrical energy (or watts) into usable photons, which are very important for photosynthesis.   Color Rendering

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Plant Elements

Plant Elements Plant Pigments Plant pigments, also known as biochromes, are compounds that absorb specific light wavelengths and “give” plants, fruits, and vegetables their colors. The most common plant pigments are chlorophyll, carotenoids, flavonoids, and betalains with chlorophyll being the most important pigment. Apart from giving color to the plant, pigments also influence photosynthesis and development. Carotenoids Carotenoids are pigments that absorb violet-green light and cause fruits and vegetables to have a red, orange, or

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diagram of twelve important nutrients. Primary: Nitrogen, Potassium, Phosphorus. Secondary: Calcium, Sulfur, Magnesium. Micro: Manganese, Iron, Copper, Molybdenum, Boron, Zinc

Plant nutrients

Nutrients Plants absorb nutrients from the soil that are essential for growth, development, and survival. These nutrients can be divided into primary (or macro), secondary, and micronutrients. Plants take in these nutrients through their roots. Some nutrients may move freely throughout the plant, while others cannot. If a nutrient can be moved, the plant will be able to provide newer parts with nutrients taken from older tissue. When the plant is unable to move nutrients

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PPF, PPFD & DLI

Photosynthetic Photon Flux (PPF) PPF is short for Photosynthetic Photon Flux. PPF is measured in micromoles per second, or µmol/s. It expresses the number of photons or total amount of PAR emitted by a light source every second. Photons are small particles that carry the electromagnetic energy of light. The PPF value says something about the total light output that can contribute to photosynthesis. PPF can be measured with a specialized instrument called an integrating

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Photosynthetically Active Radiation

Photosynthetically Active Radiation What is light? Light can be described as electromagnetic energy or waves moving from one point to another. Each wave for a certain wavelength looks the same; it has the same beginning and ending, and the same height and width. Some wavelengths are shorter, meaning faster wave formation, while other wavelengths are longer (slower wave formation). The whole range of light wavelengths is called the light spectrum. Wavelengths are measured in nanometers

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Graphical Illustration about the Emerson Effect. It shows the increase of photosynthetic rate after chloroplasts are illuminated with both Deep-Red 660nm and Far-Red 730nm.

Ultraviolet & Far-Red

Ultraviolet (UV) Ultraviolet (UV) light falls outside the visible light range, or PAR, between 100 and 400 nanometers. This type of light can be divided into UV-A, UV-B, and UV-C.  UVA lies between 320 – 400 nm and is also called Near UVUVB lies between 290 – 320 nm and is also called Middle UVUVC lies between 100 – 290 nm and is also called Far UV The correct implementation of Ultraviolet light can have

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Only the best grow lights at Horticraft Holland

Types of growlights

Table of Contents Home and professional growers have used a different variety of light sources that distribute their light differently. And while some are a big fan of HPS lamps, others swear by LEDs. Horticraft Holland thinks LED has many benefits over other types of light sources, which we will discuss in another article. In this article we want you to meet the different types of lamps growers use.  High Intensity Discharge (HID) lamps High

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