Whois & Analysis for hydrobuilder.com

Hydroponics is a subset of hydroculture, the method of growing plants without soil, using mineral nutrient solutions in a water solvent.

Terrestrial plants may be grown with only their roots exposed to the mineral solution, or the roots may be supported by an inert medium, such as perlite or gravel.

The nutrients in hydroponics can be from fish waste, duck manure, or normal nutrients.

A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm.

Plant nutrition is the study of the chemical elements and compounds necessary for plant growth, plant metabolism and their external supply.

In 1972, Emanuel Epstein defined two criteria for an element to be essential for plant growth:

A grow light or plant light is an artificial light source, generally an electric light, designed to stimulate plant growth by emitting an electromagnetic spectrum appropriate for photosynthesis.

Grow lights are used in applications where there is either no naturally occurring light, or where supplemental light is required.

For example, in the winter months when the available hours of daylight may be insufficient for the desired plant growth, lights are used to extend the time the plants receive light.

If plants do not receive enough light, they will grow long and spindly.

A light-emitting diode (LED) is a two-lead semiconductor light source.

It is a p–n junction diode, which emits light when activated.

When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.

This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor.

LEDs are typically small (less than 1 mm2) and integrated optical components may be used to shape the radiation pattern.