The Adjust-A-Wings Defender Large Super Spreader is a simple and extremely effective tool for controlling the temperature in your grow room. Contrary to popular belief that the Super Spreader covers the light source, it actually spreads the light evenly over the area and keeps the heat near the light source. This allows the shade device to be placed closer to the plant tips to achieve a temperature up to 5°C lower. An indispensable helper for controlling the temperature in the summer months.