Does passing the light through the water cause a lumen loss?
Studies have shown that the lumen loss is insignificant (6-9%) compared to the extreme increase in usable light energy due to decreased distance between your light and plant canopy. By decreasing the plant canopy to light source distance, you can realize dramatically heavier yields and denser growth. Most HIDs have traditionally been kept at a minimum distance of 16-18 The Hydroflector can be run at less than half that distance increasing light energy levels up to 16 times.