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Countless studies have shown that interior trees, herbs, shrubs, ferns and more bring happiness and improved productivity to building occupants. But those benefits mean nothing if you’re not providing the proper lighting for your interior plants.
(Photo credit: Geoff George)
So much so that Pliska decided to pen a comprehensive white paper, “Planterra Lighting Guide for Interior Landscape Design,” to provide insight on light measurement, natural and artificial light parameters and sources, plant placement and more.
More specifically, Pliska was inspired to write the document after a client mistakenly invested in garish purple grow light, which is mainly used by cannabis growers, instead of architectural lighting for their global headquarters.
(Photo credit: Tony Frantz)
To dispel that confusion, and to help facilities managers, designers and architects better sustain indoor plant installations, Pliska decided to share his knowledge with those working in the commercial sector.
(The paper does not cover growing plants, as plants installed in buildings are typically grown already in greenhouses and shade house nurseries.)
“As humans we want to be in a well-lit, natural space rather than a cave. So, I think the biggest takeaway I’ve had from looking at lighting specifically is what’s good for plants is good for people.” - Shane Pliska
Here are four key takeaways from Pliska’s lighting guide:
1. Make sure lighting is even throughout the space
Some envelope glazing technology today is so equipped for energy efficiency—multiple panes, specialized coatings, etc.—but it can filter out the proper visible light plants need. Reflective, tinted or frosted glass is found in many commercial buildings.
Only frosted glass helps distribute light more evenly, and more uniform light distribution is beneficial to interior landscape installations.
2. Provide electric lighting—preferably white, LED light—from above.
If it’s often cloudy where you are, or when daylight is just insufficient, take advantage of artificial light for plants. It can help even out the amount of light in a space for indoor plants.
In the last five to 10 years, LEDs have become the preferred interior light source because of their versatility and energy efficiency.
“LED lighting is more affordable now, and people know more about it,” Pliska explains. “At this point for new builds and renovations, buildings have the best resources they’ve ever had in regards to providing quality light for both plants and humans.”
Timers can also be incorporated with LED technology. This means you can schedule light fixtures to operate 10-12 hours (like a full day of sun).
3. Avoid up-lighting and indirect artificial light.
Up-lighting should be used for decorative purposes only, Pliska says. Some light fixtures might produce enough heat to damage understory foliage or plant roots. On the other end, indirect artificial light doesn’t provide the adequate amount.
4. When indoor plants are lit properly, humans benefit, too.
As having access to abundant natural light becomes a bigger trend in new builds and renovations, Pliska says this not only correlates to more indoor plant installations, but producing happier, healthier workplaces.
“As humans we want to be in a well-lit, natural space rather than a cave,” he explains. “So, I think the biggest takeaway I’ve had from looking at lighting specifically is what’s good for plants is good for people.”
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