Key Parameters Category Description / Value Product Line Eaton EIS (Signal Towers) Series EIS-40 Type Single-level Module Lens Diameter 40 mm Mounting Designed for modular stacking with other EIS-40 units and accessories. Compatible Lamps/LEDs Uses separate bulb or LED cartridges (e.g., standard incandescent, long-life LED modules) which are inserted into the unit. Lens Colors Available in various colors (e.g., Red, Yellow, Green, Blue, White) depending on the ordered variant. Voltage Depends on the installed lamp or LED cartridge (e.g., 24V, 48V, 110V, 230V AC/DC). Connection Typically screw terminals.