Visalert Strobe Light, 120VAC, Amber - Available in 24VDC, 120VAC and 240VAC. Five lens colors: Amber, Blue, Clear, Green and Red. 4,000 hour strobe tube. Easy surface mount installation onto Federal Signalâs 350 Vibratone horn and Model 50GC SelecTone amplified speaker (sold separately). Indoor/outdoor use. Conformal coated PCB. Type 3R enclosure. CSA Certified. UL Listed.