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2. Cannabis cultivation - Wikipedia

   en.wikipedia.org/wiki/Cannabis_cultivation

   Traditionally, most growers change their plants lighting cycle to 12 hours on and 12 hours off since this works as a happy medium to which most strains respond well. This change in photoperiod mimics the plant's natural outdoor cycle, with up to 18 hours of light per day in the summer and down to less than 12 hours of light in fall and winter.

3. Grow light - Wikipedia

   en.wikipedia.org/wiki/Grow_light

   Ficus plant grown under a white LED grow light. A grow light is an electric light that can help plants grow. Grow lights either attempt to provide a light spectrum similar to that of the sun, or to provide a spectrum that is more tailored to the needs of the plants being cultivated (typically a varying combination of red and blue light, which generally appears pink to purple to the human eye).

4. 10 Grow Lights That Actually Work to Help Your Plants Thrive

   www.aol.com/20-stylish-grow-lights-plant...

   Check out more gardening recommendations: 21 Best Gardening Tools to Tend Your Plants Like a Pro. 10 Self-Watering Planters to Make Gardening Much Easier

5. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   Since then, increased luminous efficacy and higher-power SMDs have allowed them to be used in applications such as high brightness task lighting, fluorescent and halogen lighting fixture replacements, indirect lighting applications, ultraviolet inspection during manufacturing processes, set and costume design, and growing plants.

6. Synthetic cannabinoids - Wikipedia

   en.wikipedia.org/wiki/Synthetic_cannabinoids

   Synthetic cannabinoids are a class of designer drug molecules that bind to the same receptors to which cannabinoids (THC, CBD and many others) in cannabis plants attach. [1] These novel psychoactive substances should not be confused with synthetic phytocannabinoids (obtained by chemical synthesis ) or synthetic endocannabinoids from which they ...

7. Sodium-vapor lamp - Wikipedia

   en.wikipedia.org/wiki/Sodium-vapor_lamp

   High-pressure sodium (HPS) lamps have been widely used in industrial lighting, especially in large manufacturing facilities, and are commonly used as plant grow lights. They contain mercury . [ 23 ] They have also been widely used for outdoor area lighting, such as on roadways, parking lots, and security areas.