These light bar parts are off a used Whelen 48 Inch Legacy DUO+ WeCan Lightbar that was in working when removed from service
 
Alley Warning - DUO Module White/Blue P/N: 01-0244499-23C
Corner Module - DUO Module Blue White P/N: 01-026F106-23B
Inboard Module - DUO Module White / Blue P/N: 01-026E389-23C
Inboard Module - DUO Module Amber / Blue P/N: 01-026E389-21C
Inboard Half Module - DUO Module Amber / Blue P/N: 01-0246795-21C
Inboard Half Module - DUO Module  Blue /White P/N: 01-0246795-23C