Light: Difference between revisions

== Light spectrum ==

The colour of light is dependant on the frequency of the light. see also [https://en.wikipedia.org/wiki/Electromagnetic_spectrum Electromagnetic spectrum]. Blue/purple light used to be standard in Cannabis growing but are slowly being replaced by full-spectrum lights. Throughout the plant's life cycle, it can be helpful to apply different ranges of the light spectrum.

UV light rays can damage plants and stress them, triggering the creation of more trichromes<ref>What light spectrum does weed need to grow? - Growing Cannabis 201: Advanced Grow Tips | Indica Institute - https://www.youtube.com/watch?v=NY0bB_Jmt5E</ref><ref>Pate, David W. (1983). "Possible role of ultraviolet radiation in evolution of Cannabis chemotypes" doi:10.1007/BF02904200</ref> UV lights specifically for growing are available but it is also possible to re-purpose a UV light intended for a reptile enclosure.

 

=== Low frequency light ===

 

==== Far range and infra-red====

 

== Light schedules ==