The SolarSystem Controller is not required to use any California LightWorks LED grow lights. Without the controller, you can keep a SS-1100, SS-550, or SS-275 in always on mode. This allows you to keep the light on full blast and plug it into a timer just like any other grow light.
In order to use the SS-1100, SS-550, or SS-275 to their full capabilities, we recommend purchasing the SolarSystem Controller. You will be able to customize your spectrum, set your hours of light and dark, set a calendar of programs for each growth phase, put your SS-550 or SS-1100 into view mode, use the advanced programming to change your spectrum up to 20 times in a 24 hour period, manually change your spectrum, set a sunrise / sunset length of time, and many other features. The SolarSystem Controller also can control a limitless number of SolarSystem series lights, perfect for applications of all sizes.