From the Manufacturer
The Kichler 15637BK Small HID High Intensity Discharge Accessory Hexcell Louver is an expanded aluminum shield with a high temperature black finish. This won't take away the light you are trying to achieve, but just deaden the glare of the bulb and direct it only to where you want to see it. Select Kichler mounting posts, stems, stakes and bollard mounting kits to enhance the flexibility and complete the total landscape lighting plan. Consumer surveys consistently put Kichler at the top of their list when it comes to quality, reliability and ease of installation. Quality, reliable power and ease of installation are what contractors want. Safety and performance are what homeowners need, and you can find it all from Kichler.
45 Degree Small Hexcell Louver Expanded aluminum shield with high temperature black finish