MJBizMagazine September 2021 Lighting Buyers Guide - 14

MJBizDaily Buyers Guide Lighting
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LED lights in an indoor marijuana grow. Photo courtesy of Fohse.
8 CANNABIS LIGHTING MYTHS
Myths about lighting pervade the cannabis industry.
Because the industry was underground for so many years, it led to growers doing things in ways that " make
no sense, " said Marc van Iersel, horticulture professor at the University of Georgia.
" Old school cannabis growers believe it's a special crop, different than any other plant, " van Iersel said.
" In reality, it's just one more photoperiodic greenhouse crop. In many ways, it's not that different from
growing a poinsettia or chrysanthemum. "
For the " MJBizDaily Lighting Buyers Guide " , we asked van Iersel and other horticultural lighting experts and
cannabis lighting professionals about the lighting myths they hear frequently:
1. My plants are turning purple or yellow. My light must be too high.
This isn't a problem with the light quantity being too high: cannabis can grow under very high light conditions.
But if other inputs aren't balanced to support more light-induced photosynthesis-C02
supplementation,
fertilizer, and water-the imbalance will stress the plant.
-Bruce Bugbee, professor of plant physiology, Utah State University.
2. The proper amount of light for my plants requires placing them about a foot away from
the lights.
While light quantity does decrease further away from the light, this doesn't consider the wattage of the
light itself. Some lights produce greatly more photons than others, but differences are not discernable
by the human eye. Accurately measuring how much light a plant receives can only be determined using a
quantum sensor.
-Bruce Bugbee, Utah State University.
14
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MJBizMagazine September 2021 Lighting Buyers Guide

Table of Contents for the Digital Edition of MJBizMagazine September 2021 Lighting Buyers Guide

MJBizMagazine September 2021 Lighting Buyers Guide - 1
MJBizMagazine September 2021 Lighting Buyers Guide - 2
MJBizMagazine September 2021 Lighting Buyers Guide - 3
MJBizMagazine September 2021 Lighting Buyers Guide - 4
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MJBizMagazine September 2021 Lighting Buyers Guide - 8
MJBizMagazine September 2021 Lighting Buyers Guide - 9
MJBizMagazine September 2021 Lighting Buyers Guide - 10
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MJBizMagazine September 2021 Lighting Buyers Guide - 14
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MJBizMagazine September 2021 Lighting Buyers Guide - 20
MJBizMagazine September 2021 Lighting Buyers Guide - 21
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