Why Plants See Light Differently Than Humans

Plants see light different than humans, and misunderstanding that difference can lead to inaccurate conclusions.
Understanding Life Expectancy (L90B5) in Horticultural Lighting

Life expectancy rating of a horticultural lighting luminaire is one of the most important—but often misunderstood—factors to evaluate.
Measuring Transmissibility: Understanding How Much Light Reaches Your Crop

Measuring transmissibility is critical for accurately determining your supplemental lighting requirements.
Measuring Light Levels and Spectral Output: What you Should Know

Measuring light levels is one of the most valuable tools for ensuring your supplemental lighting system is performing at its best.
Replacing Your DE Lamps (Bulbs)

Replacing your lamps is critical because every 1% loss of PAR light can cost roughly 1% of growth and yield. When to re-lamp and how to plan it.
Cleaning Horticultural Luminaires: Best Practices

The summer months, when the days are longer, are typically a great time for greenhouse growers to consider cleaning horticultural luminaires.
10 Ways to Ensure High Yields and Crop Productivity with your HPS Luminaires

How to keep your HPS luminaires at full output, from re-lamping intervals to reflector cleaning
Re-Lamping Pointers: How to Plan a Well-Thought-Out Re-lamping Schedule

Since light output depreciates over time, regular replacement of lamps is critical to maintaining the performance of HID luminaires.
How to Optimize your Lighting System for Increased Efficiency and Higher Yields

How to keep an HID or LED grow light system at full output. Re-lamping intervals, reflector cleaning, voltage and retrofit guidance from P.L. Light Systems.