A grow light or plant light is an artificial light source, generally an electric light, designed to stimulate plant growth by emitting a light 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.
Can any LED light be used as a grow light?
A range of bulb types can be used as grow lights, such as incandescents, fluorescent lights, high-intensity discharge lamps (HID), and light-emitting diodes (LED). Today, the most widely used lights for professional use are HIDs and fluorescents. … Red spectrum light may trigger a greater flowering response in plants.
What are the best grow lights for indoor plants?
Incandescent lights are good for lighting up a room or growing low-light houseplants, such as vines, ferns or dracaenas. They have limited utility for growing plants with higher light requirements. These lights put out only about 10 percent of their energy as light while 90 percent is heat.
Are LED lights good for growing seedlings?
LED Grow Lamps. Unlike other bulbs which produce light across a broad spectrum, light-emitting diodes (LEDs) give off light within a narrow band. LEDs designed for growing plants emit light in the two bands that plants need – red and blue. … LEDs are mercury-free and won’t shatter like glass.
Can you use white LED lights to grow plants?
LEDs by contrast only emit light at very narrow peaks, and normal plant growth often needs a wider spectrum. At a push plants can get by on red LEDs emitting at 690nm with some supplementary light in the blue around 450nm, which can be supplied by some white LEDs.
How do plants grow under white light?
Your question is a very good one because plants absorb light at very specific wavelengths to obtain energy. In particular, chlorophyll absorbs blue and red light while allowing green light to be reflected (or transmitted). This is why plants appear to be green to us.
Which color light is best for plant growth?
Green light is the least effective for plants because they are themselves green due to the pigment Chlorophyll. Different color light helps plants achieve different goals as well. Blue light, for example, helps encourage vegetative leaf growth. Red light, when combined with blue, allows plants to flower.
What colors of the light spectrum are most important for plant growth?
The visible light spectrum emits light in red, orange, yellow, green, blue, indigo and violet colors. Colors on either end of the spectrum play the greatest role in plant growth and flowering, while the yellow and green wavelengths play a lesser role.