Formed as the `SL2’-series, Siemens is now offering horns, strobes, and horn-strobes with LED based strobes to its notification-appliances portfolio. With the `SL2’-series, Siemens offers a full range of products with low and high candela settings that makes these sophisticated notification appliances ideal for new installs and retrofit applications. Innovative light-emitting diode (LED) strobe technology provides an energy-efficient means for a significantly reduced current draw. The strobe portion of these appliances meets the 20-millisecond light-pulse duration requirements of the 2016 edition of NFPA 72. This feature allows existing Xenon and the new LED devices to be used in the same field-of-view. In a single device, the `SL2’-series can provide alarm-signaling tones for dual applications. All strobe models in the series feature multi-Candela settings (15cd | 30cd | 75cd | 110cd | 135cd | 185cd ) on a single appliance.