Grow Light Terminology

This method of indoor farming uses a liquid solution in the air through which the plants absorb nutrients.

The integrated production of plants with that of aquatic organisms in a closed-loop system resembling nature itself.

Any chemical compounds that are the active principles of marijuana.

Found in all green plants and algae and are the food producer of plants.

A measure of how much light is emitted from a fixture and will fall on an area of a specific size or how much of the PPF that the light is producing makes its way towards the plant.

Measures the ability of a light source to bring out the true colors of an object. Without a high CRI light source, things can appear faded, dull, or inaccurate.

An academic term to describe indoor test farms, research, and programs centered around indoor farming.

A measure of the number of photosynthetically active photons accumulated on a surface over a 24-hour period. It is a function of two things:
1) The intensity of a light (measured in PPFD)
2) The duration that the light is active or turned on (measured in seconds).

A way to connect two or more light fixtures using a serial wiring plan that connects the light fixture's wires to the next in a single circuit.

The range of wavelengths or frequencies of electromagnetic radiation extending from gamma rays to the longest radio waves, including visible light. The visible light spectrum is a segment of the spectrum the human eye can see.

Luminaires that mimic natural sunlight, producing, the full spectrum of light plants require for optimal growth.

To cause to sprout or develop

High-intensity discharge lights used to grow crops indoors.

High-pressure sodium lights used to grow crops indoors

A method of growing plants without the use of soil.

Another way of growing crops using hydroponics and artificial Lighting or any light source other than natural light

Used to classify various levels of sealing effectiveness provided by an electrical enclosure (lighting fixture) against foreign bodies such as objects, water, dirt, etc. These standards are set forth by the International Electrotechnical Commission.

Able to protect against powerful water jets.

A combination of LED colors and light intensities suitable to successfully propagate a crop grown indoors.

Metal halide lights used to grow crops indoors

Growing systems starting at ground level that use artificial light and extensive indoor climate control to grow crops.

A facility characterized by vertical multi-tier (towers) growing systems that start at ground level that use artificial light and indoor climate controls.

This is the portion of the light spectrum utilized by plants for photosynthesis.

Delivered during the night to regulate flowering of daylength-sensitive plants

A process by which phototrophs convert light energy into chemical energy, which is later used to fuel cellular activities.

A qualitative assessment used to define a specific type of light.

Measures the number of protons emitted by a source of light, measured in umol/s.

A measure of the amount of PAR (measured as PPF) that arrives at the plant.

The measure of light used by plants per unit of energy consumed.

A term used to describe the delivery of light to plants that do not receive light from the sun.

Refers to the concentration, as a function of wavelength, of any radiometric or photometric quantity.

Is delivered in greenhouses during light-limiting conditions to increase crop growth.

The essential oils of plants that are aromatic organic hydrocarbons. In reference to cannabis, they are responsible for the distinct smell in each strain.

The primary psychoactive component in marijuana, hashish, and other preparations derived from cannabis plants.

Fine outgrowth of appendages on plants that appear hairlike and are thought to protect a plant from predators, pathogens, and UV light rays

This Standard applies to luminaires for use in non-hazardous locations and that are intended for installation on branch circuits of 600 V nominal or less between conductors.

Applies to lighting equipment intended for use in a horticultural environment

A building in which crops are grown commercially in multiple stacked layers. This type of farming does not use soil but employs techniques such as aquaponics, hydroponics, and aeroponics within a controlled environment.

A unit of power or radiant flux.