Internal Gears - 100% Stainless Steel - Rust Free. The item "IPower 1-12PACK 600Watt High Pressure Sodium Super HPS Grow Light Bulb Lamp" is in sale since Thursday, December 9, 2021. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Hydroponics\Grow Lighting & Accessories\Grow Lights & Light Bulbs". The seller is "healsmart_us" and is located in Duarte, California. This item can be shipped to United States.