There are 24-Vdc or 90 to 250-Vac steady and flashing models. The flashing type offers optional integrated, audible alarm and two userselectable tones. Alarm volume is manually adjustable up to 90 dB at 1 m. Wiring terminals are in the base of the tower and color-coded according to lens color. "Push-fit" locking terminals make tools unnecessary. Made from lead-free components, this product complies with the EU directive 2002/95/EC. An IP65 enclosure rating is standard. The LT7 provides intense illumination of lens colors by using a prism design to enhance the brightness of the LED. These LEDs last over 50 times longer than conventional incandescent bulbs and are about seven times more efficient, the manufacturer claims.