Daily Light Integral is a way to measure how much light is available on average to plants for their absorption. Or, as described on Wikipedia, “Daily light integral (DLI) describes the number of photosynthetically active photons (individual particles of light in the 400-700 nm range) that are delivered to a specific area over a 24-hour period.”
For more detailed information see this article, Measuring Daily Light Integral in a Greenhouse
Have you tried using this method? Please comment or contact me.
In the Advanced Section of the DIY Smart Garden System Series, we’ll use DLI to help make decisions for needing additional lighting or light compensation.
More Info:
- Why DIY when you could buy?
- What is a “Smart” Garden?
- Starting a Smart Indoor Garden
- Digging Deeper into Indoor Gardening
- Managing Nutrient Solution Systems
- The DIY Smart Garden System
- Using a Raspberry Pi and USB Camera
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hydroMazing Smart Garden System 
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