Accessories necessary for properly installing grow lights include ballasts, reflectors, timers, and light hangers. Ballasts are a critical part of the lighting system as they regulate the voltage going to the bulb. Reflectors help concentrate light energy in one direction and can be used with any type of lamp or fixture. Timers allow growers to automatically turn on and off their lights at predetermined times, helping them maintain an optimal environment for plants to thrive. Light hangers securely attach fixtures to ceilings or walls so that they are safely out of reach of curious hands.