Optilumen has produced the simplest, easiest, most efficient, and most cost effective way to upgrade your existing fluorescent fixtures, with their LED Economy Strip Fluorescent Retrofit Kit. The RKS Series is easy-to-install as the LED strips and the driver are both magnetic backed, with a screw mount option for added security. They attach themselves to the fixture body and become a physical and thermal part of the fixture, truly retrofitting the fixture into an LED luminaire. These kits are incredibly efficient and can incur huge savings compared to retrofitting with LED tubes. These kits are perfect for retrofitting 1' x 4', 2' x 4', and 2' x 2' fixtures, as well as 4' and 8' linear strip lights. Try them out today - you will not be disappointed.Here is the Optilumen RKS Series LED economy retrofit kit, part number RKS2220-(X), formerly referred to as RKS2220M-(XX). This DLC Listed retrofit kit consumes just 20 watts but produces between 2,500-2,901 lumens - that's between 125-145 lumens per watt! This kit comes with two 21" LED strips and an LED driver, all magnetically backed for easy installation and fits a 2 foot troffer or strip light. The entire body of the pre-existing luminaire becomes the heat sink for the strips, making them operate at an amazing 36°C-42°C, dramatically extending their lifespan and efficiency. These strips can run on the voltage 90-277V. When using these LED retrofit strip kits, you will not only receive incredible energy savings, but can essentially eliminate maintenance costs and greatly reduce installation fees. They are also rebate friendly, nationwide.