Hazardous Location and Explosion Proof Product Catalogs Emergency Products Catalog Industrial Products Optical Traffic Preemption Product Documentation Industrial Product Data Sheets Support Documentation Technical Reference Understanding light intensity specifications for flashing signal lights Effective Candlepower (ECP) vs. Peak Candlepower Choosing the Right Audible Signal NEC Classifications NEMA Ratings You will need the Adobe® Acrobat® Reader to view the documentation on our web site. Audible Combination Visual