Photoperiodic vs. Photosynthetic Lighting

A common question I'm asked is what the best lighting strategy is to promote early spring flowering of bedding plants and/ or herbaceous perennials. The answer to such a question is situational, depending in part... more »

Interactions of Light, CO2 and Temperature on Photosynthesis

Light and temperature are two of the most commonly manipulated environmental factors in greenhouse crop production. Supplemental lighting is useful during light-limiting conditions, while during high-light conditions, shading is often used to help prevent excessively... more »

LED Lighting and its Effect on Plants, Growers and the World

Growers like Sustainable Local Foods use LED lighting to produce plants year round while keeping costs down.As many growers have found out over the course of human history, even the sun needs some help from... more »

Turning On/Off Supplemental Lighting

An increasing number of growers are using high-intensity lighting during low-light periods to increase crop growth, especially during young plant production. The benefits of increasing the daily light integral (DLI) are well documented and include... more »

Problems with Foot-candles, Lux and Lumens

There are three ways to describe light intensity, but only one of them is appropriate for photosynthesis. Increasing use of light-emitting diodes (LEDs) means that the appropriate unit for light measurement is more important than... more »

Cleaning Up Light Pollution

As competition increases and quality and productivity pressure rises, North American growers are increasingly taking a page from their European counterparts and making lighting a crucial part of their greenhouse production programs. While extending day... more »

How to Specify LED Lighting

When it comes to lighting, the future is upon us. High-powered LED products, once the exclusive province of cutting-edge research, are invigorating today’s commercial greenhouse market. Your new choices, ranging from shelf lights and growth... more »

Simplifying Light

As Roberto Lopez helped more and more growers working to better understand and manage light in their greenhouses, a light bulb came on: There had to be an easier way.Working with graduate student Christopher Currey,... more »

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