overview
HPS lights emit a very strong and very bright color spike in the 570-590nm (yellow/orange) area of the color spectrum. This is great for growing plants, but horrible for taking pictures. The color is so strong that cameras can't properly color correct it in-camera even using custom white-balance options. We tested many different color-correction options, both in-camera and Raw processing, with varying levels of success without using a filter. Adding the filter, no matter how we chose to WB the room, always produced the best results because the Grow Light HPS filter specifically targets the color spike and blocks it from entering the camera. This allows the camera, phone, or video camera to Auto or Custom white-balance the scene with ease.
The 82mm Grow Light HPS filter is packaged in a kit that includes 3 step-up adapter rings that will allow you to attach the filter to a corresponding lens filter thread. Check out the video about the filter here. We go over how the filter works and how step-up rings works if you are not familiar with them.
