MJBizMagazine September 2021 Lighting Buyers Guide - 10

MJBizDaily Buyers Guide Lighting
mjbizdaily.com
Source: Clemson University
" You need to know how much of that sunlight is actually transmitted into the greenhouse. It's lower than
what most growers think it is, " van Iersel said, adding that natural sunlight transmission is at least 10% less
through the greenhouse.
Other factors can also influence the DLI that natural sunlight provides, including climate-particularly the
frequency of cloudy days-and hanging many lower-wattage light fixtures that create more shade, rather
than fewer high-wattage fixtures.
" The trade-off (between LEDs and HPS) to a large extent depends on how much you use the light
because LEDs are much more efficient. The more you use the lights, the more competitive they
become, " van Iersel said.
Another expense to keep in mind is that LEDs run cool while HPS lights run hot, according to Andrew
Wilmerding, representing Gavita Horticultural Lighting Systems, a division of Hawthorne Gardening Supply.
Use of LED lights will lower canopy temperatures two to four degrees compared to HPS, van Iersel said.
Depending on where the grow is located and the time of year, using LEDs versus HPS lights may save money
on HVAC cooling or, conversely, require more money spent on heating the facility, Wilmerding said.
10
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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
MJBizMagazine September 2021 Lighting Buyers Guide - 5
MJBizMagazine September 2021 Lighting Buyers Guide - 6
MJBizMagazine September 2021 Lighting Buyers Guide - 7
MJBizMagazine September 2021 Lighting Buyers Guide - 8
MJBizMagazine September 2021 Lighting Buyers Guide - 9
MJBizMagazine September 2021 Lighting Buyers Guide - 10
MJBizMagazine September 2021 Lighting Buyers Guide - 11
MJBizMagazine September 2021 Lighting Buyers Guide - 12
MJBizMagazine September 2021 Lighting Buyers Guide - 13
MJBizMagazine September 2021 Lighting Buyers Guide - 14
MJBizMagazine September 2021 Lighting Buyers Guide - 15
MJBizMagazine September 2021 Lighting Buyers Guide - 16
MJBizMagazine September 2021 Lighting Buyers Guide - 17
MJBizMagazine September 2021 Lighting Buyers Guide - 18
MJBizMagazine September 2021 Lighting Buyers Guide - 19
MJBizMagazine September 2021 Lighting Buyers Guide - 20
MJBizMagazine September 2021 Lighting Buyers Guide - 21
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